Create group
POST https://graph.microsoft.com/v1.0/external/connections/sampleConnectionId/groups
Create group under the connection
Request Body
{"id"=>"graphConnectorGroupId", "displayName"=>"Display name of group sampleExternalGroupId"}
POST https://graph.microsoft.com/v1.0/external/connections/sampleConnectionId/groups
Create group under the connection
{"id"=>"graphConnectorGroupId", "displayName"=>"Display name of group sampleExternalGroupId"}