BulkAdd not working on SPA

[vsuaste]

The query for bulk creating doesn't coincide with graphql API.
Bulk add returns a string, while in the SPA the query expects to receive an array of records, as in the older version of the schema.
Now if we try to use it, we'll receive the error:

GraphQLError: Field "bulkAddCuadranteCsv" must not have a selection since type "String!" has no subfields.
    at Object.Field (/usr/Sandbox/graphql-server/node_modules/graphql/validation/rules/ScalarLeafs.js:42:33)
    at Object.enter (/usr/Sandbox/graphql-server/node_modules/graphql/language/visitor.js:324:29)
    at Object.enter (/usr/Sandbox/graphql-server/node_modules/graphql/language/visitor.js:375:25)
    at visit (/usr/Sandbox/graphql-server/node_modules/graphql/language/visitor.js:242:26)
    at validate (/usr/Sandbox/graphql-server/node_modules/graphql/validation/validate.js:73:24)
    at /usr/Sandbox/graphql-server/node_modules/express-graphql/index.js:121:32
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
{"message":"Field \"bulkAddCuadranteCsv\" must not have a selection since type \"String!\" has no subfields.","locations":[{"line":1,"column":30}],"source":{"body":"mutation{ bulkAddCuadranteCsv{ cuadrante_id} }","name":"GraphQL request","locationOffset":{"line":1,"column":1}},"positions":[29]}

Fix this on SPA.