diff --git a/Back/skydiveLogs-api.Business/Interface/IAircraftService.cs b/Back/skydiveLogs-api.Business/Interface/IAircraftService.cs
index 3cba1c9..415f0ae 100644
--- a/Back/skydiveLogs-api.Business/Interface/IAircraftService.cs
+++ b/Back/skydiveLogs-api.Business/Interface/IAircraftService.cs
@@ -1,8 +1,8 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Collections.Generic;
+
 using skydiveLogs_api.Model;
 
+
 namespace skydiveLogs_api.Business.Interface
 {
     public interface IAircraftService
diff --git a/Back/skydiveLogs-api.Business/Interface/IDropZoneService.cs b/Back/skydiveLogs-api.Business/Interface/IDropZoneService.cs
index 6042116..37cf401 100644
--- a/Back/skydiveLogs-api.Business/Interface/IDropZoneService.cs
+++ b/Back/skydiveLogs-api.Business/Interface/IDropZoneService.cs
@@ -1,6 +1,8 @@
 using System.Collections.Generic;
+
 using skydiveLogs_api.Model;
 
+
 namespace skydiveLogs_api.Business.Interface
 {
     public interface IDropZoneService
diff --git a/Back/skydiveLogs-api.Business/Interface/IGearService.cs b/Back/skydiveLogs-api.Business/Interface/IGearService.cs
index 2f6f951..d88c6cc 100644
--- a/Back/skydiveLogs-api.Business/Interface/IGearService.cs
+++ b/Back/skydiveLogs-api.Business/Interface/IGearService.cs
@@ -1,6 +1,8 @@
 using System.Collections.Generic;
+
 using skydiveLogs_api.Model;
 
+
 namespace skydiveLogs_api.Business.Interface
 {
     public interface IGearService
@@ -11,8 +13,8 @@ namespace skydiveLogs_api.Business.Interface
 
         void DeleteGearById(int id);
 
-        void UpdateGear(int id, Gear Gear);
+        void UpdateGear(int id, Gear gear);
 
-        void AddNewGear(Gear Gear);
+        void AddNewGear(Gear gear);
     }
 }
diff --git a/Back/skydiveLogs-api.Business/Interface/IJumpService.cs b/Back/skydiveLogs-api.Business/Interface/IJumpService.cs
index dae85d7..caf8d39 100644
--- a/Back/skydiveLogs-api.Business/Interface/IJumpService.cs
+++ b/Back/skydiveLogs-api.Business/Interface/IJumpService.cs
@@ -1,8 +1,8 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Collections.Generic;
+
 using skydiveLogs_api.Model;
 
+
 namespace skydiveLogs_api.Business.Interface
 {
     public interface IJumpService
diff --git a/Back/skydiveLogs-api.Business/Interface/IJumpTypeService.cs b/Back/skydiveLogs-api.Business/Interface/IJumpTypeService.cs
index 17eb098..e41bd44 100644
--- a/Back/skydiveLogs-api.Business/Interface/IJumpTypeService.cs
+++ b/Back/skydiveLogs-api.Business/Interface/IJumpTypeService.cs
@@ -1,7 +1,7 @@
-using skydiveLogs_api.Model;
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Collections.Generic;
+
+using skydiveLogs_api.Model;
+
 
 namespace skydiveLogs_api.Business.Interface
 {
diff --git a/Back/skydiveLogs-api.Business/Interface/IUserService.cs b/Back/skydiveLogs-api.Business/Interface/IUserService.cs
new file mode 100644
index 0000000..48cbe1a
--- /dev/null
+++ b/Back/skydiveLogs-api.Business/Interface/IUserService.cs
@@ -0,0 +1,11 @@
+using skydiveLogs_api.Model;
+
+namespace skydiveLogs_api.Business.Interface
+{
+    public interface IUserService
+    {
+        User GetByLogin(string login, string password);
+
+        void AddNewUser(User user);
+    }
+}
diff --git a/Back/skydiveLogs-api.Business/UserService.cs b/Back/skydiveLogs-api.Business/UserService.cs
new file mode 100644
index 0000000..5336c4f
--- /dev/null
+++ b/Back/skydiveLogs-api.Business/UserService.cs
@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+
+using skydiveLogs_api.Business.Interface;
+using skydiveLogs_api.Model;
+using skydiveLogs_api.Data.Interface;
+
+
+namespace skydiveLogs_api.Business
+{
+    public class UserService : IUserService
+    {
+        public UserService(IUserRepository userRepository)
+        {
+            _userRepository = userRepository;
+        }
+
+        public User GetByLogin(string login, string password)
+        {
+            var tmp = _userRepository.GetByLogin(login, password);
+
+            return tmp;
+        }
+
+        public void AddNewUser(User newUser)
+        {
+            _userRepository.Add(newUser);
+        }
+
+        private readonly IUserRepository _userRepository;
+    }
+}
diff --git a/Back/skydiveLogs-api.Data/Interface/IDataProvider.cs b/Back/skydiveLogs-api.Data/Interface/IDataProvider.cs
index 14208c8..2b33ef1 100644
--- a/Back/skydiveLogs-api.Data/Interface/IDataProvider.cs
+++ b/Back/skydiveLogs-api.Data/Interface/IDataProvider.cs
@@ -20,5 +20,7 @@ namespace skydiveLogs_api.Data.Interface
         ILiteCollection<JumpType> CollOfJumpType { get; }
 
         ILiteCollection<Jump> CollOfJump { get; }
+
+        ILiteCollection<User> CollOfUser { get; }
     }
 }
diff --git a/Back/skydiveLogs-api.Data/Interface/IUserRepository.cs b/Back/skydiveLogs-api.Data/Interface/IUserRepository.cs
new file mode 100644
index 0000000..2289d6e
--- /dev/null
+++ b/Back/skydiveLogs-api.Data/Interface/IUserRepository.cs
@@ -0,0 +1,10 @@
+using skydiveLogs_api.Model;
+
+
+namespace skydiveLogs_api.Data.Interface
+{
+    public interface IUserRepository : IRepository<User>
+    {
+        User GetByLogin(string login, string password);
+    }
+}
diff --git a/Back/skydiveLogs-api.Data/LiteDbProvider.cs b/Back/skydiveLogs-api.Data/LiteDbProvider.cs
index 0a6f11d..89fff6a 100644
--- a/Back/skydiveLogs-api.Data/LiteDbProvider.cs
+++ b/Back/skydiveLogs-api.Data/LiteDbProvider.cs
@@ -37,5 +37,7 @@ namespace skydiveLogs_api.Data
         public ILiteCollection<JumpType> CollOfJumpType => _db.GetCollection<JumpType>();
 
         public ILiteCollection<Jump> CollOfJump => _db.GetCollection<Jump>();
+
+        public ILiteCollection<User> CollOfUser => _db.GetCollection<User>();
     }
 }
diff --git a/Back/skydiveLogs-api.Data/UserRepository.cs b/Back/skydiveLogs-api.Data/UserRepository.cs
new file mode 100644
index 0000000..18c388c
--- /dev/null
+++ b/Back/skydiveLogs-api.Data/UserRepository.cs
@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using LiteDB;
+
+using skydiveLogs_api.Data.Interface;
+using skydiveLogs_api.Model;
+
+
+namespace skydiveLogs_api.Data
+{
+    public class UserRepository : IUserRepository
+    {
+        public UserRepository(IDataProvider dataProvider)
+        {
+            _dataProvider = dataProvider;
+            _col = _dataProvider.CollOfUser;
+        }
+
+        public User GetByLogin(string login, string password)
+        {
+            return _col.FindOne(u => u.Login == login && u.Password == password);
+        }
+
+        public bool Add(User newUser)
+        {
+            var result = true;
+
+            try
+            {
+                _col.Insert(newUser);
+            }
+            catch
+            {
+                result = false;
+            }
+
+            return result;
+        }
+
+        public IEnumerable<User> GetAll()
+        {
+            throw new NotImplementedException();
+        }
+
+        public User GetById(int id)
+        {
+            throw new NotImplementedException();
+        }
+
+        public bool Update(User updated)
+        {
+            throw new NotImplementedException();
+        }
+
+        private readonly IDataProvider _dataProvider;
+
+        private readonly ILiteCollection<User> _col;
+    }
+}
diff --git a/Back/skydiveLogs-api.Data/skydiveLogs-api.Data.csproj b/Back/skydiveLogs-api.Data/skydiveLogs-api.Data.csproj
index 079557f..e67d3fb 100644
--- a/Back/skydiveLogs-api.Data/skydiveLogs-api.Data.csproj
+++ b/Back/skydiveLogs-api.Data/skydiveLogs-api.Data.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="LiteDB" Version="5.0.1" />
+    <PackageReference Include="LiteDB" Version="5.0.3" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/Back/skydiveLogs-api.Model/User.cs b/Back/skydiveLogs-api.Model/User.cs
new file mode 100644
index 0000000..a43a392
--- /dev/null
+++ b/Back/skydiveLogs-api.Model/User.cs
@@ -0,0 +1,15 @@
+namespace skydiveLogs_api.Model
+{
+    public class User
+    {
+        public int Id { get; set; }
+
+		public string FirstName { get; set; }
+
+		public string LastName { get; set; }
+
+        public string Login { get; set; }
+
+        public string Password { get; set; }
+    }
+}
diff --git a/Back/skydiveLogs-api/Controllers/UserController.cs b/Back/skydiveLogs-api/Controllers/UserController.cs
new file mode 100644
index 0000000..96b9134
--- /dev/null
+++ b/Back/skydiveLogs-api/Controllers/UserController.cs
@@ -0,0 +1,44 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Cors;
+
+using AutoMapper;
+
+using skydiveLogs_api.Business.Interface;
+using skydiveLogs_api.DataContract;
+using skydiveLogs_api.Model;
+
+
+namespace skydiveLogs_api.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    public class UserController : ControllerBase
+    {
+        public UserController(IUserService userService,
+                              IMapper mapper)
+        {
+            _userService = userService;
+            _mapper = mapper;
+        }
+
+        // POST: api/User
+        [HttpPost]
+        [EnableCors]
+        public UserResp Authenticate([FromBody] string login, [FromBody] string password)
+        {
+            var result = _userService.GetByLogin(login, password);
+            return _mapper.Map<UserResp>(result);
+        }
+
+        // POST: api/User
+        [HttpPost]
+        [EnableCors]
+        public void Post([FromBody] UserReq value)
+        {
+            _userService.AddNewUser(_mapper.Map<User>(value));
+        }
+
+        private readonly IUserService _userService;
+        private readonly IMapper _mapper;
+    }
+}
diff --git a/Back/skydiveLogs-api/Data/JumpsDb-log.db b/Back/skydiveLogs-api/Data/JumpsDb-log.db
deleted file mode 100644
index c473c06..0000000
Binary files a/Back/skydiveLogs-api/Data/JumpsDb-log.db and /dev/null differ
diff --git a/Back/skydiveLogs-api/Data/JumpsDb.db b/Back/skydiveLogs-api/Data/JumpsDb.db
index ce2b393..ee60975 100644
Binary files a/Back/skydiveLogs-api/Data/JumpsDb.db and b/Back/skydiveLogs-api/Data/JumpsDb.db differ
diff --git a/Back/skydiveLogs-api/DataContract/AircraftResp.cs b/Back/skydiveLogs-api/DataContract/AircraftResp.cs
index 5f8f86e..b5c6261 100644
--- a/Back/skydiveLogs-api/DataContract/AircraftResp.cs
+++ b/Back/skydiveLogs-api/DataContract/AircraftResp.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-
-namespace skydiveLogs_api.DataContract
+namespace skydiveLogs_api.DataContract
 {
     public class AircraftResp
     {
diff --git a/Back/skydiveLogs-api/DataContract/JumpReq.cs b/Back/skydiveLogs-api/DataContract/JumpReq.cs
index 2bc2da0..c50216e 100644
--- a/Back/skydiveLogs-api/DataContract/JumpReq.cs
+++ b/Back/skydiveLogs-api/DataContract/JumpReq.cs
@@ -1,7 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace skydiveLogs_api.DataContract
 {
diff --git a/Back/skydiveLogs-api/DataContract/JumpTypeReq.cs b/Back/skydiveLogs-api/DataContract/JumpTypeReq.cs
index 3533915..ca702a1 100644
--- a/Back/skydiveLogs-api/DataContract/JumpTypeReq.cs
+++ b/Back/skydiveLogs-api/DataContract/JumpTypeReq.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-
-namespace skydiveLogs_api.DataContract
+namespace skydiveLogs_api.DataContract
 {
     public class JumpTypeReq
     {
diff --git a/Back/skydiveLogs-api/DataContract/JumpTypeResp.cs b/Back/skydiveLogs-api/DataContract/JumpTypeResp.cs
index bb8583e..44fe563 100644
--- a/Back/skydiveLogs-api/DataContract/JumpTypeResp.cs
+++ b/Back/skydiveLogs-api/DataContract/JumpTypeResp.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-
-namespace skydiveLogs_api.DataContract
+namespace skydiveLogs_api.DataContract
 {
     public class JumpTypeResp
     {
diff --git a/Back/skydiveLogs-api/DataContract/UserReq.cs b/Back/skydiveLogs-api/DataContract/UserReq.cs
new file mode 100644
index 0000000..e1971dc
--- /dev/null
+++ b/Back/skydiveLogs-api/DataContract/UserReq.cs
@@ -0,0 +1,13 @@
+namespace skydiveLogs_api.DataContract
+{
+    public class UserReq
+    {
+        public string FirstName { get; set; }
+
+        public string LastName { get; set; }
+
+        public string Login { get; set; }
+
+        public string Password { get; set; }
+    }
+}
diff --git a/Back/skydiveLogs-api/DataContract/UserResp.cs b/Back/skydiveLogs-api/DataContract/UserResp.cs
new file mode 100644
index 0000000..87f6b35
--- /dev/null
+++ b/Back/skydiveLogs-api/DataContract/UserResp.cs
@@ -0,0 +1,13 @@
+namespace skydiveLogs_api.DataContract
+{
+    public class UserResp
+    {
+        public int Id { get; set; }
+
+        public string FirstName { get; set; }
+
+        public string LastName { get; set; }
+
+        public string Login { get; set; }
+    }
+}
diff --git a/Back/skydiveLogs-api/Mapper/ModelProfile.cs b/Back/skydiveLogs-api/Mapper/ModelProfile.cs
index 68f60f2..0f4277e 100644
--- a/Back/skydiveLogs-api/Mapper/ModelProfile.cs
+++ b/Back/skydiveLogs-api/Mapper/ModelProfile.cs
@@ -11,6 +11,7 @@ namespace skydiveLogs_api.Mapper
             CreateMap<DataContract.AircraftReq, Model.Aircraft>();
             CreateMap<DataContract.DropZoneReq, Model.DropZone>();
             CreateMap<DataContract.GearReq, Model.Gear>();
+            CreateMap<DataContract.UserReq, Model.User>();
 
             CreateMap<Model.Gear, DataContract.GearResp>();
             CreateMap<Model.Jump, DataContract.JumpResp>();
@@ -18,6 +19,7 @@ namespace skydiveLogs_api.Mapper
             CreateMap<Model.Aircraft ,DataContract.AircraftResp>();
             CreateMap<Model.DropZone ,DataContract.DropZoneResp>();
             CreateMap<Model.Statistic ,DataContract.StatisticResp>();
+            CreateMap<Model.User, DataContract.UserResp>();
 
             CreateMap<Model.SimpleSummary, DataContract.SimpleSummaryResp>();
         }