In ospf network loopback address always send with /32 subnet mask unless you set the command of ip ospf network point-to-point in interface loopback mode command.

When you use the sync yes option in the event cli command, the EEM applet runs before the CLI command is executed. The EEM applet should set the _exit_status variable to indicate whether the CLI command should be executed (_exit_status set to one) or not (_exit_status set to zero).
With the sync no option, the EEM applet is executed in background in parallel with the CLI command.
Reference: https://blog.ipspace.net/2011/01/eem-event-cli-command-options-and.html

The most common implementations of OAuth (OAuth 2.0) use one or both of these tokens:
+ access token: sent like an API key, it allows the application to access a user's data; optionally, access tokens can expire.
+ refresh token: optionally part of an OAuth flow, refresh tokens retrieve a new access token if they have expired. OAuth2 combines Authentication and Authorization to allow more sophisticated scope and validity control.