flickrFactory.getImagesFromUserById({
    id:"<USER_ID>", // username converter: https://idgettr.com/
    lang:"<LANGUAGE>", // (optional) https://www.flickr.com/services/feeds/
}).then(function(_data){
    //on success
}).catch(function (_data) {
    //on error
});

flickrFactory.getImagesFromUserById({
    ids:"<USER_ID_1>,<USER_ID_2>", // username converter: https://idgettr.com/
    lang:"<LANGUAGE>", // (optional) https://www.flickr.com/services/feeds/
}).then(function(_data){
    //on success
}).catch(function (_data) {
    //on error
});

flickrFactory.getImagesByTags({
    tags:"<TAG_1>,<TAG_2>",
    tagmode:"<TAG_MODE>", // (optional) Control whether items must have ALL the tags (tagmode=all), or ANY (tagmode=any) of the tags. Default is ALL.
    lang:"<LANGUAGE>", // (optional) https://www.flickr.com/services/feeds/
}).then(function(_data){
    //on success
}).catch(function (_data) {
    //on error
});