I found problem. I did not added expire time for token. Because of that when I tried to send it to api it did not understood what it was.

app.config['JWT_ACCESS_TOKEN_EXPIRES'] = timedelta(days=7)

Another option why it was no working because I did not added required extension get_jwt

from flask_jwt_extended import JWTManager, create_access_token, jwt_required, get_jwt_identity, get_jwt