public bool UserExists(
	string apiUsername,
	string apiPassword,
	string UserExternalID
)

Public Function UserExists ( 
	apiUsername As String,
	apiPassword As String,
	UserExternalID As String
) As Boolean

public:
virtual bool UserExists(
	String^ apiUsername, 
	String^ apiPassword, 
	String^ UserExternalID
) sealed

abstract UserExists : 
        apiUsername : string * 
        apiPassword : string * 
        UserExternalID : string -> bool 
override UserExists : 
        apiUsername : string * 
        apiPassword : string * 
        UserExternalID : string -> bool