fix getting jwt fields from request

apps/authentication/api/v1/serializers/jwt.py

@@ -17,9 +17,11 @@ class CustomizedTokenObtainPairSerializer(TokenObtainPairSerializer):  # noqa
         """
         override validate method to add more conditions
         """
-        captcha_code, captcha_key = attrs['captcha_code'], attrs['captcha_key']
 
-        if captcha_code != cache.get(captcha_key) or captcha_code not in attrs.keys():
+        captcha_code = self.context['request'].data['captcha_code']
+        captcha_key = self.context['request'].data['captcha_key']
+
+        if captcha_code != cache.get(captcha_key) or captcha_code not in self.context['request'].data.keys():
             raise captcha_exception.CaptchaFailed()
 
         data = super().validate(attrs)