DROP AUTHID Statement

Enables you to drop authorization identifiers.
DROP { AUTHID | AUTHORIZATION [IDENTIFIER] } "ID" [TRANSFER TO
name] [CASCADE|RESTRICT] [FORCE] 
“ID”
Specifies the authorization identity to drop. The ID must be in quotation marks.
This is the user ID or the group ID that you can find by using the AUTHORIZATION_IDENTIFIERS information view.
name
Specifies the authorization identity that will receive object ownership from the dropped identity. This user name is created using the Authentication Server.
FORCE Specifies the optional FORCE keyword that will suppress error messages when the user does not exist
CASCADE Specifies the entities are dropped unconditionally. All records that reference the entity are removed. This option is invalid if the TRANSFER TO option is specified.
RESTRICT Specifies the drop fails if the entity is the grantor of any privilege. The drop also fails if the entity is the owner of a DSN or schema. This option is ignored if the TRANSFER TO option is specified.
Examples:
drop authid "5E563F78B0D70854086FB3D8441EF9AA" transfer to user2
drop authid "F135005B80DED494E996F70DCC53790D"  cascade
drop authid "B8A105927F25B1A47AE8198D1E3C4B86" transfer to user2 force