The AUTHZR_TOKEN_GROUPS structure represents a security identifier (SID) and its attributes.

 typedef struct _AUTHZR_TOKEN_GROUPS {
     DWORD GroupCount;
     [size_is(GroupCount)] AUTHZR_SID_AND_ATTRIBUTES Groups[];
 } AUTHZR_TOKEN_GROUPS;
  
  

GroupCount:  Indicates the number of structures in the Groups array.

Groups:  An array of AUTHZR_SID_AND_ATTRIBUTES structures (section 2.2.3.8) representing groups associated with the token.