Add user avatar and profile feature, consolidate Auth and UserManagement features (#257)

web/backend/Features/Features.Users/Commands/Authentication/Login/LoginValidator.cs

@@ -0,0 +1,14 @@
+using FluentValidation;
+
+namespace Features.Auth.Commands.Authentication.Login;
+
+/// <summary>Validates that <see cref="LoginCommand.Username" /> and <see cref="LoginCommand.Password" /> are present.</summary>
+public class LoginValidator : AbstractValidator<LoginCommand>
+{
+    public LoginValidator()
+    {
+        RuleFor(x => x.Username).NotEmpty().WithMessage("Username is required");
+
+        RuleFor(x => x.Password).NotEmpty().WithMessage("Password is required");
+    }
+}