public String getAuthUrl(String... scopes) {
		String requestedScopes = "";
		
		/* Trailing space doesn't matter */
		for (String scope : scopes)
			requestedScopes += scope + "%20";
		
		return "https://angel.co/api/oauth/authorize?" +
				"client_id=" + mClientId +
				"&scope=" + requestedScopes +
				"&response_type=code";
	}