Node or nodes which takes pictures with an ip camera with username and password each time when it have an request

Not sure at all what you are doing here...

As @BartButenaers says, keep is simple.
e.g.
image

[{"id":"ffb8a714.ea9888","type":"http request","z":"4d512b28.912bc4","name":"camera image request","method":"GET","ret":"bin","paytoqs":false,"url":"https://picsum.photos/200/300","tls":"","persist":false,"proxy":"","authType":"","x":380,"y":120,"wires":[["1f1afe2.af8eb02"]]},{"id":"d2c53e2b.f0046","type":"inject","z":"4d512b28.912bc4","name":"Start","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"x":190,"y":120,"wires":[["ffb8a714.ea9888"]]},{"id":"1f1afe2.af8eb02","type":"image viewer","z":"4d512b28.912bc4","name":"","width":"200","data":"payload","dataType":"msg","x":590,"y":120,"wires":[[]]}]

Then you can get more adventurous...

[{"id":"ffb8a714.ea9888","type":"http request","z":"4d512b28.912bc4","name":"camera image request","method":"GET","ret":"bin","paytoqs":false,"url":"https://picsum.photos/200/300","tls":"","persist":false,"proxy":"","authType":"","x":380,"y":120,"wires":[["733d290b.b183d8","55aaaa98.bce024"]]},{"id":"d2c53e2b.f0046","type":"inject","z":"4d512b28.912bc4","name":"Start","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"x":190,"y":120,"wires":[["ffb8a714.ea9888"]]},{"id":"1f1afe2.af8eb02","type":"image viewer","z":"4d512b28.912bc4","name":"","width":"200","data":"payload","dataType":"msg","x":870,"y":120,"wires":[[]]},{"id":"733d290b.b183d8","type":"jimp-image","z":"4d512b28.912bc4","name":"","data":"payload","dataType":"msg","ret":"img","parameter1":"45","parameter1Type":"num","parameter2":"RESIZE_NEAREST_NEIGHBOR","parameter2Type":"resizeMode","parameter3":"","parameter3Type":"msg","parameter4":"","parameter4Type":"msg","parameter5":"","parameter5Type":"msg","parameter6":"","parameter6Type":"msg","parameter7":"","parameter7Type":"msg","parameter8":"","parameter8Type":"msg","parameterCount":2,"jimpFunction":"rotate","selectedJimpFunction":{"name":"rotate","fn":"rotate","description":"rotate the image clockwise by a number of degrees. Optionally, a resize mode can be passed. If `false` is passed as the second parameter, the image width and height will not be resized.","parameters":[{"name":"deg","type":"num","required":true,"hint":"the number of degrees to rotate the image by"},{"name":"mode","type":"resizeMode|bool","required":false,"hint":"resize mode or a boolean, if false then the width and height of the image will not be changed"}]},"x":570,"y":120,"wires":[["a03d832d.0ec7","730f902c.24f16"]]},{"id":"a03d832d.0ec7","type":"jimp-image","z":"4d512b28.912bc4","name":"","data":"payload","dataType":"msg","ret":"img","parameter1":"3","parameter1Type":"num","parameter2":"RESIZE_NEAREST_NEIGHBOR","parameter2Type":"none","parameter3":"","parameter3Type":"none","parameter4":"","parameter4Type":"none","parameter5":"","parameter5Type":"none","parameter6":"","parameter6Type":"msg","parameter7":"","parameter7Type":"msg","parameter8":"","parameter8Type":"msg","parameterCount":1,"jimpFunction":"blur","selectedJimpFunction":{"name":"blur","fn":"blur","description":"fast blur the image by r pixels","parameters":[{"name":"r","type":"num","required":true,"hint":"the pixel radius of the blur"}]},"x":710,"y":120,"wires":[["1f1afe2.af8eb02"]]},{"id":"730f902c.24f16","type":"image viewer","z":"4d512b28.912bc4","name":"","width":"200","data":"payload","dataType":"msg","x":670,"y":240,"wires":[[]]},{"id":"55aaaa98.bce024","type":"image viewer","z":"4d512b28.912bc4","name":"","width":"200","data":"payload","dataType":"msg","x":530,"y":400,"wires":[[]]}]