RecruitingBehavioural interventionreSET for the Treatment of Stimulant Use in HIV Clinics: Care Optimization Supporting Treatment Adherence (COSTA)The purpose of this study is to find out if reSET, an FDA authorized mobile therapeutic, is effective in treating stimulant use disorder and helping keep HIV viral load suppression stable among men who have sex with men who are living with HIV and have a stimulant use disorder.