add: route get verification status

app/api/users.py

@@ -125,3 +125,7 @@ async def verify_code(verify_code: VerifyCode):
 @router.post("/auth/generate_code")
 async def generate_code(username: str):
     return await AuthService().generate_code(username)
+
+@router.get("/auth/verification_status/{username}")
+async def get_verification_status(username: str):
+    return await AuthService().get_verification_status(username)