RESO API SMLSA 400: bad_client error when getting token

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Hi! We just started receiving this error when trying to get a new access token.

{ "error": "invalid_client" }

We are using the following to log in

• URL: "https://smlsa.paragonrels.com/OData/SMLSA/identity/connect/token"
• client_id: "smlsaBlueroof360"
• client_secret: omitted