Cancels a community group join request sent by the user. 

This method can be accessed through the CommunityGroup.asmx file located in:

~/Workarea/webservices/WebServiceAPI/Community/CommunityGroup.asmx

[SoapHeader("AuthHeader")]
[SoapHeader("RequestInfoHeader")]
[WebMethod(MessageName = "CancelJoinRequestForCommunityGroup", Description = "Cancels a group join request sent by the user.")]
public void CancelJoinRequestForCommunityGroup(long groupId, long userId);

<SoapHeader("AuthHeader")>
<SoapHeader("RequestInfoHeader")>
<WebMethod(MessageName = "CancelJoinRequestForCommunityGroup", Description = "Cancels a group join request sent by the user.")>
Public Function CancelJoinRequestForCommunityGroup(groupId As long, userId As long) As void