Expose and Consume NetSuite

I am trying to make an outsystems integration to NetSuite using the REST API, this connection is successful, but nevertheless I cannot make the connection more than once.

The first connection after generating a token is successful but when trying again with the same access parameters it returns "INVALID_LOGIN" although the parameters remain the same

If you could help me I would be completely grateful, since I do not think it is a NetSuite error, since if I try the same REST API connectivity from PostMan with the same information, all requests to the server work correctly. Thanks and regards

This is how look if the connection iseffective.

Im using suitetalk,but i tried with RestlLets and getting the same result.

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