Finished database management and user authentication

HopFrame.Api/Models/SingleValueResult.cs

@@ -0,0 +1,13 @@
+namespace HopFrame.Api.Models;
+
+public struct SingleValueResult<T>(T value) {
+    public T Value { get; set; } = value;
+
+    public static implicit operator T(SingleValueResult<T> v) {
+        return v.Value;
+    }
+
+    public static implicit operator SingleValueResult<T>(T v) {
+        return new SingleValueResult<T>(v);
+    }
+}

HopFrame.Api/Models/UserLogin.cs

@@ -0,0 +1,6 @@
+namespace HopFrame.Api.Models;
+
+public struct UserLogin {
+    public string Email { get; set; }
+    public string Password { get; set; }
+}

HopFrame.Api/Models/UserRegister.cs

@@ -0,0 +1,7 @@
+namespace HopFrame.Api.Models;
+
+public struct UserRegister {
+    public string Username { get; set; }
+    public string Email { get; set; }
+    public string Password { get; set; }
+}