@JvmOverloads fun authorize(context: Context, clientId: String = KakaoSdk.applicationContextInfo.clientId, redirectUri: String = "kakao${KakaoSdk.applicationContextInfo.clientId}://oauth", approvalType: String = "individual"): Single<String>
Custom Tabs (기본 브라우저) 를 사용하여 authorization code 를 발급 받는다.
context
- instance for starting an activity
Return
Single that will emit authorization code