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db.dropUser(username, writeConcern)¶Removes the user from the current database.
The db.dropUser() method takes the following arguments:
username | 
string | The name of the user to remove from the database. | 
writeConcern | 
document | writeConcern document takes the same fields as the getLastError command. | 
The db.dropUser() method wraps the dropUser command.
Before dropping a user who has the userAdminAnyDatabase role, ensure you have at least another user with user administration privileges.
If run on a replica set, db.dropUser() is executed using majority write concern by default.
The following db.dropUser() operation drops the reportUser1 user on the products database.