Error jwt_auth_no_auth_header when validating the JWT token of the WordPress REST API

I'm having trouble validating the "JWT Authentication WP-API" token.

I get the token well using "wp-json / jwt-auth / v1 / token" but to validate the token to get the user's information by "wp-json / jwt-auth / v1 / token / validate" gives me the following error:

{   "code": "jwt_auth_no_auth_header",   "message": "Authorization header not found.",   "data": {     "status": 403   } }

Sending by Post code: "jwt_auth"

Any idea what the error might be? Would there be another way to get customer data through the token?

Thank you very much. Greetings