Hi there, Thank you for opening an issue. Please provide the following information: ### Opentofu Versin 1.6.2 ### Affected Resource(s) Install the provider ### Debug Output ``` Error: Failed to install provider │ │ Error while installing cyrilgdn/postgresql v1.22.0: authentication │ signature from unknown issuer ╵ ``` ### Expected Behavior Provider should be installed ### Actual Behavior Issue in install the provider ### Steps to Reproduce Please list the steps required to reproduce the issue, for example: 1. `opentofu init` ### References Are there any other GitHub issues (open or closed) or Pull Requests that should be linked here? For example: - https://github.com/cyrilgdn/terraform-provider-postgresql/issues/446 - https://github.com/opentofu/registry/issues/1213