Hi ok - here is the code - ok with dummy user & password
[{"id":"69d0a2fd.2852bc","type":"tab","label":"Flow 2","disabled":false,"info":""},{"id":"b50cf1c7.4b0cf","type":"ui_text_input","z":"69d0a2fd.2852bc","name":"","label":"IP Address","tooltip":"","group":"428dce81.ff2a","order":1,"width":0,"height":0,"passthru":true,"mode":"text","delay":"100","topic":"","x":290,"y":180,"wires":[["c7a9e037.2410b"]]},{"id":"c7a9e037.2410b","type":"change","z":"69d0a2fd.2852bc","name":"","rules":[{"t":"set","p":"textInput","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":390,"y":240,"wires":[["b5792190.02991"]]},{"id":"b5792190.02991","type":"switch","z":"69d0a2fd.2852bc","name":"is text empty?","property":"textInput","propertyType":"flow","rules":[{"t":"empty"},{"t":"else"}],"checkall":"true","repair":false,"outputs":2,"x":560,"y":300,"wires":[["b3a4b783.34fa38"],["6f01601.54167a"]]},{"id":"b3a4b783.34fa38","type":"change","z":"69d0a2fd.2852bc","name":"enabled false","rules":[{"t":"set","p":"enabled","pt":"msg","to":"false","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":770,"y":220,"wires":[["7a4e57d3.22c028"]]},{"id":"6f01601.54167a","type":"change","z":"69d0a2fd.2852bc","name":"enabled true","rules":[{"t":"set","p":"enabled","pt":"msg","to":"true","tot":"bool"}],"action":"","property":"","from":"","to":"","reg":false,"x":770,"y":300,"wires":[["7a4e57d3.22c028"]]},{"id":"f0e43f02.daf87","type":"inject","z":"69d0a2fd.2852bc","name":"Empty string","topic":"","payload":"","payloadType":"str","repeat":"","crontab":"","once":true,"onceDelay":0.1,"x":150,"y":120,"wires":[["b50cf1c7.4b0cf"]]},{"id":"bbc2f278.f31f2","type":"ui_text_input","z":"69d0a2fd.2852bc","name":"","label":"User","tooltip":"","group":"428dce81.ff2a","order":2,"width":0,"height":0,"passthru":true,"mode":"text","delay":"100","topic":"","x":170,"y":480,"wires":[["a11d2c80.a64f7"]]},{"id":"5afc1824.5ae5a8","type":"ui_text_input","z":"69d0a2fd.2852bc","name":"","label":"Password","tooltip":"","group":"428dce81.ff2a","order":3,"width":0,"height":0,"passthru":true,"mode":"password","delay":"100","topic":"","x":180,"y":560,"wires":[["b73ff49a.063bc8"]]},{"id":"a11d2c80.a64f7","type":"change","z":"69d0a2fd.2852bc","name":"","rules":[{"t":"set","p":"username","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":370,"y":480,"wires":[[]]},{"id":"b73ff49a.063bc8","type":"change","z":"69d0a2fd.2852bc","name":"","rules":[{"t":"set","p":"password","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":370,"y":560,"wires":[[]]},{"id":"7a4e57d3.22c028","type":"ui_button","z":"69d0a2fd.2852bc","name":"","group":"428dce81.ff2a","order":4,"width":0,"height":0,"passthru":false,"label":"Connect","tooltip":"","color":"","bgcolor":"","icon":"","payload":"textInput","payloadType":"flow","topic":"","x":1000,"y":220,"wires":[["6f7015ca.3df55c"]]},{"id":"6f7015ca.3df55c","type":"change","z":"69d0a2fd.2852bc","name":"","rules":[{"t":"set","p":"myserver","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":1050,"y":340,"wires":[["a9f6946f.3300d8"]]},{"id":"a9f6946f.3300d8","type":"template","z":"69d0a2fd.2852bc","name":"U-SAPCE","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"https://{{flow.myserver}}/api","output":"str","x":1040,"y":460,"wires":[["7897f57f.060e2c"]]},{"id":"7897f57f.060e2c","type":"change","z":"69d0a2fd.2852bc","name":"","rules":[{"t":"set","p":"url","pt":"msg","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":950,"y":580,"wires":[["fce0eeb8.b48e3"]]},{"id":"fce0eeb8.b48e3","type":"http request","z":"69d0a2fd.2852bc","name":"HTTP Request","method":"GET","ret":"obj","paytoqs":false,"url":"","tls":"610d97c4.ffa868","persist":false,"proxy":"","authType":"basic","x":1160,"y":580,"wires":[[]]},{"id":"428dce81.ff2a","type":"ui_group","z":"","name":"Authentication","tab":"bf5e28db.e3f7b8","order":1,"disp":true,"width":"6","collapse":false},{"id":"610d97c4.ffa868","type":"tls-config","z":"","name":"","cert":"","key":"","ca":"","certname":"","keyname":"","caname":"","servername":"","verifyservercert":false},{"id":"bf5e28db.e3f7b8","type":"ui_tab","z":"","name":"ITA Colo","icon":"dashboard","order":1,"disabled":false,"hidden":false}]