public ApiResponse<DefaultOAuth2AccessToken> retrieveTokenWithHttpInfo(String grantType, String accept, String authorization, String clientId, String password, String refreshToken, String scope, String username) throws ApiException {
        com.squareup.okhttp.Call call = retrieveTokenValidateBeforeCall(grantType, accept, authorization, clientId, password, refreshToken, scope, username, null, null);
        Type localVarReturnType = new TypeToken<DefaultOAuth2AccessToken>(){}.getType();
        return apiClient.execute(call, localVarReturnType);
    }
public ApiResponse < DefaultOAuth2AccessToken > retrieveTokenWithHttpInfo ( String grantType , String accept , String authorization , String clientId , String password , String refreshToken , String scope , String username ) throws ApiException { com . squareup . okhttp . Call call = retrieveTokenValidateBeforeCall ( grantType , accept , authorization , clientId , password , refreshToken , scope , username , null , null ) ; Type localVarReturnType = new TypeToken < DefaultOAuth2AccessToken > ( ) { } . getType ( ) ; return apiClient . execute ( call , localVarReturnType ) ; }
Retrieve access token
Retrieve an access token based on the grant type &amp;mdash; Authorization Code Grant, Resource Owner Password Credentials Grant or Client Credentials Grant. For more information, see [Token Endpoint](https://tools.ietf.org/html/rfc6749). **Note:** For the optional **scope** parameter, the Authentication API supports only the &#x60;*&#x60; value.
@param grantType The grant type you use to implement authentication. (required)
@param accept The media type the Authentication API should should use for the response. For example: &#39;Accept: application/x-www-form-urlencoded&#39; (optional)
@param authorization Basic authorization. For example: &#39;Authorization: Basic Y3...MQ&#x3D;&#x3D;&#39; (optional)
@param clientId The ID of the application or service that is registered as the client. You&#39;ll need to get this value from your PureEngage Cloud representative. (optional)
@param password The agent&#39;s password. (optional)
@param refreshToken See [Refresh Token](https://tools.ietf.org/html/rfc6749#section-1.5) for details. (optional)
@param scope The scope of the access request. The Authentication API supports only the &#x60;*&#x60; value. (optional)
@param username The agent&#39;s username. (optional)
@return ApiResponse&lt;DefaultOAuth2AccessToken&gt;
@throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body