Вытащил солюшен на уровень выше, чтобы прощё было дотнетить

Domains/Users/Role.cs

@@ -0,0 +1,12 @@
+namespace Domains.Users;
+
+/// Role of <see cref="User"/>
+public enum Role
+{
+    /// Requests visa applications
+    Applicant,
+    /// Approves or declines applications
+    ApprovingAuthority,
+    /// Manages approving authorities
+    Admin
+}

Domains/Users/User.cs

@@ -0,0 +1,13 @@
+namespace Domains.Users;
+
+public class User : IEntity
+{
+    /// Unique Identifier of <see cref="User"/>
+    public Guid Id { get; private set; } = Guid.NewGuid();
+
+    public Role Role { get; set; }
+
+    public string Email { get; set; } = null!;
+
+    public string Password { get; set; } = null!;
+}