chore: add headers as optional parameter to face selfie

alice/face/face.py

@@ -1,4 +1,4 @@
-from typing import Union
+from typing import Dict, Union
 
 from meiga import Failure, Result, Success
 from requests import Response, Session
@@ -50,10 +50,14 @@ def selfie(
         media: bytes,
         extract_face_pad: bool = True,
         extract_face_profile: bool = True,
+        headers: Union[Dict[str, str], None] = None,
     ) -> Result[SelfieResult, FaceError]:
+        if headers is None:
+            headers = {}
+
         response = self.session.post(
             url=f"{self.url}/selfie",
-            headers={"apikey": self.api_key},
+            headers={"apikey": self.api_key} | headers,
             files={"media": media},
             data={
                 "extract_face_pad": extract_face_pad,

alice/face/face_models.py

@@ -137,16 +137,20 @@ class MatchResult(BaseModel):
 
 
 class FaceError(Error):
-    def __init__(self, message: str, status_code: int):
+    def __init__(self, message: str, status_code: int, url: str):
         self.message = message
         self.status_code = status_code
+        self.url = url
 
     @staticmethod
     def from_response(response: Response) -> "FaceError":
         return FaceError(
             message=str(response.content),
             status_code=response.status_code,
+            url=response.url,
         )
 
     def __repr__(self) -> str:
-        return f"{self.__class__.__name__}: {self.status_code} {self.message}"
+        return (
+            f"{self.__class__.__name__}: {self.status_code} {self.message} | {self.url}"
+        )