Add Role unsetting functionality

src/Imprink.Application/Users/DeleteUserRoleHandler.cs

@@ -0,0 +1,29 @@
+using Imprink.Application.Users.Dtos;
+using Imprink.Domain.Entities.Users;
+using MediatR;
+
+namespace Imprink.Application.Users;
+
+public record DeleteUserRoleCommand(string Sub, Guid RoleId) : IRequest<UserRoleDto?>;
+
+public class DeleteUserRoleHandler(IUnitOfWork uw) : IRequestHandler<DeleteUserRoleCommand, UserRoleDto?>
+{
+    public async Task<UserRoleDto?> Handle(DeleteUserRoleCommand request, CancellationToken cancellationToken)
+    {
+        if (!await uw.UserRepository.UserExistsAsync(request.Sub, cancellationToken)) return null;
+
+        var userRole = new UserRole
+        {
+            UserId = request.Sub,
+            RoleId = request.RoleId
+        };
+        
+        var removedRole = await uw.UserRoleRepository.RemoveUserRoleAsync(userRole, cancellationToken);
+
+        return new UserRoleDto
+        {
+            UserId = removedRole.UserId,
+            RoleId = removedRole.RoleId
+        };
+    }
+}

src/Imprink.WebApi/Controllers/Users/UserRoleController.cs

@@ -11,7 +11,7 @@ namespace Imprink.WebApi.Controllers.Users;
 public class UserRoleController(IMediator mediator) : ControllerBase
 {
     [Authorize]
-    [HttpGet("me")]
+    [HttpGet("/me")]
     public async Task<IActionResult> GetMyRoles()
     {
         var claims = User.Claims as Claim[] ?? User.Claims.ToArray();
@@ -23,7 +23,7 @@ public class UserRoleController(IMediator mediator) : ControllerBase
     }
     
     [Authorize(Roles = "Admin")]
-    [HttpPost("set")]
+    [HttpPost("/set")]
     public async Task<IActionResult> SetUserRole(SetUserRoleCommand command)
     {
         var userRole = await mediator.Send(command);
@@ -33,4 +33,16 @@ public class UserRoleController(IMediator mediator) : ControllerBase
         
         return Ok(userRole);
     }
+    
+    [Authorize(Roles = "Admin")]
+    [HttpPost("/unset")]
+    public async Task<IActionResult> UnsetUserRole(DeleteUserRoleCommand command)
+    {
+        var userRole = await mediator.Send(command);
+        
+        if (userRole == null)
+            return BadRequest();
+        
+        return Ok(userRole);
+    }
 }