diff --git a/Front/skydivelogs-app/src/services/aircraft.service.ts b/Front/skydivelogs-app/src/services/aircraft.service.ts
index b784ddc..7b461fb 100644
--- a/Front/skydivelogs-app/src/services/aircraft.service.ts
+++ b/Front/skydivelogs-app/src/services/aircraft.service.ts
@@ -1,20 +1,21 @@
 import { Injectable } from '@angular/core';
-import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { HttpClient } from '@angular/common/http';
 import { Observable } from 'rxjs';
-import { environment } from '../environments/environment';
+
 import { AircraftResp, AircraftReq } from '../models/aircraft';
 
-@Injectable()
-export class AircraftService {
+import { BaseService } from './base.service';
 
-  private readonly headers = new HttpHeaders({
-    'Access-Control-Allow-Origin': environment.apiUrl
-  });
-  constructor(private http: HttpClient) { }
+
+@Injectable()
+export class AircraftService extends BaseService {
+  constructor(private http: HttpClient) {
+    super();
+  }
 
   public getListOfAircrafts(): Observable<Array<AircraftResp>> {
     return this.http.get<Array<AircraftResp>>(
-      `${environment.apiUrl}/api/Aircraft`,
+      `${this.apiUrl}/Aircraft`,
       { headers: this.headers }
     );
   }
@@ -26,7 +27,7 @@ export class AircraftService {
     };
 
     this.http
-      .post(`${environment.apiUrl}/api/Aircraft`, bodyNewAircraft, {
+      .post(`${this.apiUrl}/Aircraft`, bodyNewAircraft, {
         headers: this.headers
       })
       .subscribe(data => console.log(data));
diff --git a/Front/skydivelogs-app/src/services/authentication.service.ts b/Front/skydivelogs-app/src/services/authentication.service.ts
index 8670009..7199329 100644
--- a/Front/skydivelogs-app/src/services/authentication.service.ts
+++ b/Front/skydivelogs-app/src/services/authentication.service.ts
@@ -1,24 +1,23 @@
 import { Injectable } from '@angular/core';
-import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { HttpClient } from '@angular/common/http';
 
 import { BehaviorSubject, Observable } from 'rxjs';
 import { map } from 'rxjs/operators';
 
-import { environment } from '../environments/environment';
 import { User } from '../models/user';
+import { BaseService } from './base.service';
 
 
 @Injectable({
   providedIn: 'root'
 })
-export class AuthenticationService {
-  private readonly headers = new HttpHeaders({
-    'Access-Control-Allow-Origin': environment.apiUrl
-  });
+export class AuthenticationService extends BaseService {
   private currentUserSubject: BehaviorSubject<User>;
   public currentUser: Observable<User>;
 
   constructor(private http: HttpClient) {
+    super();
+
     this.currentUserSubject = new BehaviorSubject<User>(JSON.parse(localStorage.getItem('currentUser')));
     this.currentUser = this.currentUserSubject.asObservable();
   }
@@ -33,7 +32,7 @@ export class AuthenticationService {
       password: password
     };
 
-    return this.http.post<any>(`${environment.apiUrl}/api/User/Authenticate`, bodyLogin, {
+    return this.http.post<any>(`${this.apiUrl}/User/Authenticate`, bodyLogin, {
       headers: this.headers
     })
       .pipe(map(user => {
diff --git a/Front/skydivelogs-app/src/services/base.service.ts b/Front/skydivelogs-app/src/services/base.service.ts
new file mode 100644
index 0000000..5f090ea
--- /dev/null
+++ b/Front/skydivelogs-app/src/services/base.service.ts
@@ -0,0 +1,18 @@
+import { Injectable } from '@angular/core';
+import { HttpHeaders } from '@angular/common/http';
+import { environment } from '../environments/environment';
+
+
+@Injectable()
+export class BaseService {
+    protected readonly headers: HttpHeaders;
+    protected readonly apiUrl: string;
+
+    constructor() {
+        this.headers = new HttpHeaders({
+            'Access-Control-Allow-Origin': environment.apiUrl
+        });
+
+        this.apiUrl = environment.apiUrl + '/api';
+    }
+}
diff --git a/Front/skydivelogs-app/src/services/dropzone.service.ts b/Front/skydivelogs-app/src/services/dropzone.service.ts
index 30959fa..958d6fa 100644
--- a/Front/skydivelogs-app/src/services/dropzone.service.ts
+++ b/Front/skydivelogs-app/src/services/dropzone.service.ts
@@ -1,22 +1,22 @@
 import { Injectable } from '@angular/core';
-import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { HttpClient } from '@angular/common/http';
 import { Observable } from 'rxjs';
 import { map } from 'rxjs/operators';
-import { environment } from '../environments/environment';
+
 import { DropZoneResp } from '../models/dropzone';
 
+import { BaseService } from './base.service';
+
 
 @Injectable()
-export class DropzoneService {
-
-  private readonly headers = new HttpHeaders({
-    'Access-Control-Allow-Origin': environment.apiUrl
-  });
-  constructor(private http: HttpClient) { }
+export class DropzoneService extends BaseService {
+  constructor(private http: HttpClient) {
+    super();
+  }
 
   public getListOfDropZones(): Observable<Array<DropZoneResp>> {
     return this.http
-      .get<Array<DropZoneResp>>(`${environment.apiUrl}/api/DropZone`, {
+      .get<Array<DropZoneResp>>(`${this.apiUrl}/DropZone`, {
         headers: this.headers
       })
       .pipe(
@@ -30,7 +30,7 @@ export class DropzoneService {
   public SetFavoriteDropZone(selectedDz: DropZoneResp): boolean {
     selectedDz.isFavorite = true;
     this.http
-      .put(`${environment.apiUrl}/api/DropZone/${selectedDz.id}`, selectedDz, {
+      .put(`${this.apiUrl}/DropZone/${selectedDz.id}`, selectedDz, {
         headers: this.headers
       })
       .subscribe(data => console.log(data));
@@ -41,12 +41,11 @@ export class DropzoneService {
   public RemoveFavoriteDropZone(selectedDz: DropZoneResp): boolean {
     selectedDz.isFavorite = false;
     this.http
-      .put(`${environment.apiUrl}/api/DropZone/${selectedDz.id}`, selectedDz, {
+      .put(`${this.apiUrl}/DropZone/${selectedDz.id}`, selectedDz, {
         headers: this.headers
       })
       .subscribe(data => console.log(data));
 
     return true;
   }
-
 }
diff --git a/Front/skydivelogs-app/src/services/gear.service.ts b/Front/skydivelogs-app/src/services/gear.service.ts
index bac7469..00c4c60 100644
--- a/Front/skydivelogs-app/src/services/gear.service.ts
+++ b/Front/skydivelogs-app/src/services/gear.service.ts
@@ -1,20 +1,20 @@
 import { Injectable } from '@angular/core';
-import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { HttpClient } from '@angular/common/http';
 import { Observable } from 'rxjs';
-import { environment } from '../environments/environment';
+
 import { GearResp, GearReq } from '../models/gear';
 
+import { BaseService } from './base.service';
+
 
 @Injectable()
-export class GearService {
-
-  private readonly headers = new HttpHeaders({
-    'Access-Control-Allow-Origin': environment.apiUrl
-  });
-  constructor(private http: HttpClient) { }
+export class GearService extends BaseService {
+  constructor(private http: HttpClient) {
+    super();
+  }
 
   public getListOfGears(): Observable<Array<GearResp>> {
-    return this.http.get<Array<GearResp>>(`${environment.apiUrl}/api/Gear`, {
+    return this.http.get<Array<GearResp>>(`${this.apiUrl}/Gear`, {
       headers: this.headers
     });
   }
@@ -38,7 +38,7 @@ export class GearService {
     };
 
     this.http
-      .post(`${environment.apiUrl}/api/Gear`, bodyNewGear, {
+      .post(`${this.apiUrl}/Gear`, bodyNewGear, {
         headers: this.headers
       })
       .subscribe(data => console.log(data));
diff --git a/Front/skydivelogs-app/src/services/jump-type.service.ts b/Front/skydivelogs-app/src/services/jump-type.service.ts
index fd657d8..63bda73 100644
--- a/Front/skydivelogs-app/src/services/jump-type.service.ts
+++ b/Front/skydivelogs-app/src/services/jump-type.service.ts
@@ -1,20 +1,21 @@
 import { Injectable } from '@angular/core';
-import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { HttpClient } from '@angular/common/http';
 import { Observable } from 'rxjs';
-import { environment } from '../environments/environment';
+
 import { JumpTypeResp } from '../models/jumpType';
 
-@Injectable()
-export class JumpTypeService {
+import { BaseService } from './base.service';
 
-  private readonly headers = new HttpHeaders({
-    'Access-Control-Allow-Origin': environment.apiUrl
-  });
-  constructor(private http: HttpClient) { }
+
+@Injectable()
+export class JumpTypeService extends BaseService {
+  constructor(private http: HttpClient) {
+    super();
+  }
 
   public getListOfJumpTypes(): Observable<Array<JumpTypeResp>> {
     return this.http.get<Array<JumpTypeResp>>(
-      `${environment.apiUrl}/api/JumpType`,
+      `${this.apiUrl}/JumpType`,
       { headers: this.headers }
     );
   }
diff --git a/Front/skydivelogs-app/src/services/jump.service.ts b/Front/skydivelogs-app/src/services/jump.service.ts
index a732d22..df8d75d 100644
--- a/Front/skydivelogs-app/src/services/jump.service.ts
+++ b/Front/skydivelogs-app/src/services/jump.service.ts
@@ -1,21 +1,22 @@
 import { Injectable } from '@angular/core';
-import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { HttpClient } from '@angular/common/http';
 import { Observable } from 'rxjs';
 import { map } from 'rxjs/operators';
-import { environment } from '../environments/environment';
-import { DateService } from './date.service';
+
 import { JumpResp, JumpReq } from '../models/jump';
 
-@Injectable()
-export class JumpService {
+import { DateService } from './date.service';
+import { BaseService } from './base.service';
 
-  private readonly headers = new HttpHeaders({
-    'Access-Control-Allow-Origin': environment.apiUrl
-  });
-  constructor(private http: HttpClient, private dateService: DateService) { }
+
+@Injectable()
+export class JumpService extends BaseService {
+  constructor(private http: HttpClient, private dateService: DateService) {
+    super();
+  }
 
   public getListOfJumps(): Observable<Array<JumpResp>> {
-    return this.http.get<Array<JumpResp>>(`${environment.apiUrl}/api/Jump`, {
+    return this.http.get<Array<JumpResp>>(`${this.apiUrl}/Jump`, {
       headers: this.headers
     })
       .pipe(
@@ -98,7 +99,7 @@ export class JumpService {
       };
 
       this.http
-        .post(`${environment.apiUrl}/api/Jump`, bodyNewjump, {
+        .post(`${this.apiUrl}/Jump`, bodyNewjump, {
           headers: this.headers
         })
         .subscribe(data => console.log(data));
diff --git a/Front/skydivelogs-app/src/services/stats.service.ts b/Front/skydivelogs-app/src/services/stats.service.ts
index 91adbf1..15e1ff4 100644
--- a/Front/skydivelogs-app/src/services/stats.service.ts
+++ b/Front/skydivelogs-app/src/services/stats.service.ts
@@ -1,8 +1,8 @@
 import { Injectable } from '@angular/core';
-import { HttpClient, HttpHeaders } from '@angular/common/http';
+import { HttpClient } from '@angular/common/http';
 import { Observable } from 'rxjs';
 import { map } from 'rxjs/operators';
-import { environment } from '../environments/environment';
+
 import {
   StatsResp,
   StatsByDzResp,
@@ -15,13 +15,14 @@ import {
   SimpleSummary
 } from '../models/stats';
 
-@Injectable()
-export class StatsService {
-  private readonly headers = new HttpHeaders({
-    'Access-Control-Allow-Origin': environment.apiUrl
-  });
+import { BaseService } from './base.service';
 
-  constructor(private http: HttpClient) { }
+
+@Injectable()
+export class StatsService extends BaseService {
+  constructor(private http: HttpClient) {
+    super();
+  }
 
   public getStatsOfJumps(): StatsResp {
     const resultats = new StatsResp();
@@ -42,7 +43,7 @@ export class StatsService {
 
   private getSimpleSummary(): Observable<SimpleSummary> {
     return this.http
-      .get<Array<SimpleSummary>>(`${environment.apiUrl}/api/Stats/Simple`, {
+      .get<Array<SimpleSummary>>(`${this.apiUrl}/Stats/Simple`, {
         headers: this.headers
       })
       .pipe(
@@ -55,7 +56,7 @@ export class StatsService {
 
   private getStatsByDz(): Observable<Array<StatsByDzResp>> {
     return this.http
-      .get<Array<StatsByDzResp>>(`${environment.apiUrl}/api/Stats/ByDz`, {
+      .get<Array<StatsByDzResp>>(`${this.apiUrl}/Stats/ByDz`, {
         headers: this.headers
       })
       .pipe(
@@ -69,7 +70,7 @@ export class StatsService {
   private getStatsByAircraft(): Observable<Array<StatsByAircraftResp>> {
     return this.http
       .get<Array<StatsByAircraftResp>>(
-        `${environment.apiUrl}/api/Stats/ByAircraft`,
+        `${this.apiUrl}/Stats/ByAircraft`,
         { headers: this.headers }
       )
       .pipe(
@@ -83,7 +84,7 @@ export class StatsService {
   private getStatsByJumpType(): Observable<Array<StatsByJumpTypeResp>> {
     return this.http
       .get<Array<StatsByJumpTypeResp>>(
-        `${environment.apiUrl}/api/Stats/ByJumpType`,
+        `${this.apiUrl}/Stats/ByJumpType`,
         { headers: this.headers }
       )
       .pipe(
@@ -96,7 +97,7 @@ export class StatsService {
 
   private getStatsByGear(): Observable<Array<StatsByGearResp>> {
     return this.http
-      .get<Array<StatsByGearResp>>(`${environment.apiUrl}/api/Stats/ByGear`, {
+      .get<Array<StatsByGearResp>>(`${this.apiUrl}/Stats/ByGear`, {
         headers: this.headers
       })
       .pipe(
@@ -109,7 +110,7 @@ export class StatsService {
 
   private getStatsByYear(): Observable<Array<StatsByYearResp>> {
     return this.http
-      .get<Array<StatsByYearResp>>(`${environment.apiUrl}/api/Stats/ByYear`, {
+      .get<Array<StatsByYearResp>>(`${this.apiUrl}/Stats/ByYear`, {
         headers: this.headers
       })
       .pipe(
@@ -123,7 +124,7 @@ export class StatsService {
   private getStatsOfLastYear(): Observable<StatsForLastYearResp> {
     return this.http
       .get<StatsForLastYearResp>(
-        `${environment.apiUrl}/api/Stats/ForLastYear`,
+        `${this.apiUrl}/Stats/ForLastYear`,
         { headers: this.headers }
       )
       .pipe(
@@ -141,7 +142,7 @@ export class StatsService {
   private getStatsOfLastMonth(): Observable<StatsForLastMonthResp> {
     return this.http
       .get<StatsForLastYearResp>(
-        `${environment.apiUrl}/api/Stats/ForLastMonth`,
+        `${this.apiUrl}/Stats/ForLastMonth`,
         { headers: this.headers }
       )
       .pipe(