Logger.error

You're seeing just the macro error, go back to Logger module for more information.

error(message_or_fun, metadata \\ [])

(macro) (since 1.11.0)

Logs a error message.

Returns :ok.

Logging a message (string or iodata):

Logger.error("this is a error message")

Report message (maps or keywords):

# as keyword list
Logger.error([something: :reported, this: :error])

# as map
Logger.error(%{something: :reported, this: :error})