export const Actions = { SIGNIN : 'AUTH/SIGNIN' , SIGNOUT : 'AUTH/SIGNOUT' } ; export interface AuthModuleState { isSignedin : boolean | null ; isSigningOut : boolean ; } type ActionTypes = typeof Actions . SIGNIN | typeof Actions . SIGNOUT ; export interface AuthModuleAction { type : ActionTypes ; } export interface ASYNC_STORAGE_KEYS { TOKEN : string ; }