Optionalparameters: {OptionalfieldId?: stringThe custom field id
OptionalissueTypeId?: stringThe list of issue type ids to further restrict the search
OptionalmaxResults?: stringThe maximum number of users to return
OptionalprojectId?: stringThe list of project ids to further restrict the search
Optionalquery?: stringA string used to search username, Name or e-mail address
OptionalshowAvatar?: stringShow avatar
Optionaloptions: RequestOptions
Returns a list of users and groups matching query with highlighting