Hi @Lorena Escobar,
Thank you for posting question here,
You have to add user in PPAC https://admin.powerplatform.microsoft.com/ Envionment --> Select your environment --> Settings --> Users --> select or add users and then select Powerautomate Operator or System adminisrator role depends upon yyour requirement
Please let me know how it goes.
Kinldy accept this as answer if it helps