Astarte.RPC.Config.amqp_connection_username-exclamation-mark

You're seeing just the function amqp_connection_username-exclamation-mark, go back to Astarte.RPC.Config module for more information.
Link to this function

amqp_connection_username!(namespace \\ nil)

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Specs

amqp_connection_username!(Skogsra.Env.namespace()) :: binary() | no_return()

Username for accessing the AMQP broker.

Bang version of Astarte.RPC.Config.amqp_connection_username/0 (fails on error). Optionally, receives the namespace for the variable.