{"errors":[{"message":"Variable \"$accessTokenFilter\" got invalid value null at \"accessTokenFilter.userName\"; Expected non-nullable type \"String!\" not to be null.","extensions":{"code":"BAD_USER_INPUT","exception":{"stacktrace":["GraphQLError: Variable \"$accessTokenFilter\" got invalid value null at \"accessTokenFilter.userName\"; Expected non-nullable type \"String!\" not to be null.","    at /home/ubuntu/production/source/gateway-service/node_modules/graphql/execution/values.js:116:15","    at coerceInputValueImpl (/home/ubuntu/production/source/gateway-service/node_modules/graphql/utilities/coerceInputValue.js:57:5)","    at coerceInputValueImpl (/home/ubuntu/production/source/gateway-service/node_modules/graphql/utilities/coerceInputValue.js:105:34)","    at coerceInputValueImpl (/home/ubuntu/production/source/gateway-service/node_modules/graphql/utilities/coerceInputValue.js:54:14)","    at coerceInputValue (/home/ubuntu/production/source/gateway-service/node_modules/graphql/utilities/coerceInputValue.js:37:10)","    at _loop (/home/ubuntu/production/source/gateway-service/node_modules/graphql/execution/values.js:109:69)","    at coerceVariableValues (/home/ubuntu/production/source/gateway-service/node_modules/graphql/execution/values.js:121:16)","    at getVariableValues (/home/ubuntu/production/source/gateway-service/node_modules/graphql/execution/values.js:50:19)","    at /home/ubuntu/production/source/gateway-service/node_modules/@apollo/gateway/dist/index.js:566:67","    at NoopContextManager.with (/home/ubuntu/production/source/gateway-service/node_modules/@opentelemetry/api/build/src/context/NoopContextManager.js:36:24)"]}}}]}