Added write_only=True for better doc generation (#699)

* Added write_only=True for better doc generation

Auto doc generators can perform better and generate more accurate docs
by having this argument.
Username field in TokenObtainSerializer and token in TokenVerifySerializer
has been changed.

* Added write_only=True to TokenBlacklistSerializer's refresh field

Author: Yaser-Amiri

rest_framework_simplejwt/serializers.py

@@ -38,7 +38,7 @@ class TokenObtainSerializer(serializers.Serializer):
     def __init__(self, *args, **kwargs) -> None:
         super().__init__(*args, **kwargs)
 
-        self.fields[self.username_field] = serializers.CharField()
+        self.fields[self.username_field] = serializers.CharField(write_only=True)
         self.fields["password"] = PasswordField()
 
     def validate(self, attrs: Dict[str, Any]) -> Dict[Any, Any]:
@@ -147,7 +147,7 @@ def validate(self, attrs: Dict[str, Any]) -> Dict[str, str]:
 
 
 class TokenVerifySerializer(serializers.Serializer):
-    token = serializers.CharField()
+    token = serializers.CharField(write_only=True)
 
     def validate(self, attrs: Dict[str, None]) -> Dict[Any, Any]:
         token = UntypedToken(attrs["token"])
@@ -164,7 +164,7 @@ def validate(self, attrs: Dict[str, None]) -> Dict[Any, Any]:
 
 
 class TokenBlacklistSerializer(serializers.Serializer):
-    refresh = serializers.CharField()
+    refresh = serializers.CharField(write_only=True)
     token_class = RefreshToken
 
     def validate(self, attrs: Dict[str, Any]) -> Dict[Any, Any]: