Update version and error handler for authorization header

Now returns an JSON format for decode when authorization header is not available

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = Flask-authgen-jwt
-version = 4.0.0
+version = 4.1.0
 author = Diego Martinez
 license = MIT
 author_email = [email protected]

src/flask_authgen_jwt.py

@@ -250,6 +250,8 @@ def __decode_jwt(self) -> Optional[dict]:
         :return: the decoded token or None if an error occurred
         """
         auth_header = request.headers.get("Authorization")
+        if auth_header is None:
+            self.gen_abort_error("Authorization header is missing", 400)
         auth_header = auth_header.split(" ")
         token = auth_header[1]
         del auth_header