Validates a token for a particular service.

Returns a token for the given username/password combination with a given expiration time.

Returns a token for the given username/password combination.

The Authentication Web Service is used to validate users of Restricted ArcWeb Services. The first time a client accesses a Restricted ArcWeb Service, it must call the Authentication Web Service with a user name and password over a Secure Hypertext Transfer Protocol (HTTPS) Secure Sockets Layer (SSL) connection. These security measures minimize the risk that an unauthorized user can access a Restricted ArcWeb Service by stealing valid login information. If the user and password are valid, the Authentication Web Service returns a token. The token is a binary encoded string that the client application uses to call Restricted ArcWeb Services.