add user schema

src/schemas/user.py

@@ -0,0 +1,11 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class User:
+    username: str
+    id: int
+    email: str
+
+    def __repr__(self):
+        return f"Name: {self.username}\nMatrikelnr.: {self.id}\neMail: {self.email}"