1. A method comprising: receiving a request for authorization from an auxiliary account at an instant messaging system, the request for authorization including information of the auxiliary account; receiving a request for authorization verification from a primary account at the instant messaging system in response to the request for authorization from the auxiliary account, the request for authorization verification including login information of an online business associated with the primary account and the information of the auxiliary account; recording an authorization relation between the auxiliary account and the primary account at the instant messaging system upon successful verification; receiving a request for managing the online business associated with the primary account at the instant messaging system; and authorizing the auxiliary account to manage the online business associated with the primary account based on the recorded authorization relation.