expires_at da resposta.{
"access_token": "eyJhbGciOi...",
"expires_at": 1723829414,
"refresh_expires_in": 0,
"token_type": "Bearer",
"scope": "pix.read billets.read infractions.write api-account billets.create webhook.read billets.write infractions.read pix.write pix.create webhook.write transactions.read account.read"
}expires_at representa o limite de validade do token