[Refactor] get reported user by user's id (#45)

## Description
- get reported user by user's id
- change Pydantic models
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## Related Issue

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app/crud/crud_reports.py

@@ -8,10 +8,8 @@
 def create_report(
     db: Session, reporter_id: int, report_in: ReportUser
 ) -> ReportResponse:
-    # Get the reported user by user name
-    reported_user = (
-        db.query(User).filter(User.username == report_in.reported_user_name).first()
-    )
+    # Get the reported user by user's id
+    reported_user = db.query(User).filter(User.id == report_in.reported_id).first()
 
     if not reported_user:
         raise HTTPException(status_code=400, detail="Reported user not found")

app/models/domain/reports.py

@@ -2,14 +2,12 @@
 
 
 class ReportUser(BaseModel):
-    reported_user_name: str
+    reported_id: int
     reason: str
 
 
-class ReportResponse(BaseModel):
+class ReportResponse(ReportUser):
     reporter_id: int
-    reported_id: int
-    reason: str
 
     class Config:
         orm_mode = True