PasswordEditText | Reveal Password EditText for Android | Android library

I am using material design 'com.google.android.material:material:1.3.0' in my Android app ( just to add password toggle for password field). I don't want other material features being included to my EditText.As you can see on the screenshot, green line appears when PasswordEditText is touched. How can i get it rid of and leave only password toggle among material design features? I tried to use app:boxBackgroundMode="none" app:boxStrokeWidth="0dp" app:boxStrokeWidthFocused="0dp" app:boxStrokeColor="@android:color/transparent" to remove the line but it didn't help.

Here is XML of Material design EditText:

Requirement: In Android app code, in MainActivity, I want to call a REST POST API through Volley and then pass the JSON response as it is in next Activity. But the response which gets passed is blank. The code is:

Please note that

System.out.println(globalOutput); //THIS DOESN'T PRINT ANYTHING

As mentioned in the title, my setError icon and endIconMode are fused in one

Basically i want the endIconMode a little bit on the left, or on the right. How can i do this?

Here is the Java:

I am trying to create the Android version of a curl GET request. Works great in terminal, but fails in the app.

The curl request (urls are not real):

I have implemented Junit test with Mokito for my app. I like to test the Login Activity. But getting Nullpointer exception.

LoginActivity

For severals days I'm looking for a way to have a SFTP connection with Delphi. I know that before it was not possible freely (SecureBlackBox, ect...), that for example Indy could not support SFTP but it was old messages. Is it now possible ? I need to read a file using SFTP. Thank you in advance !

EDIT :

I could do what I wanted to do with SecureBridge and , the code below if anyone needs it :

Im trying to compare the users input (username and password) with the user objects (eg user1, user5) to see if they match and if they do then the user will be directed into another activity because they would've been able to successfully logged in, and if not a message will be displayed. Ive created a class called User which I call to get the userName and password. I think a if statement will work for this to compare them by using .equal but when I try the app no matter if the input is correct or not it buts the message that the details were incorrect. Its like it is fully ignoring all my if statements apart from the last one. Can anyone tell me if there is a better way to achieve this or if there is something wrong in my code? Errors aren't showing up anywhere.

User class:

Apologies, I know there are similar questions on the forum already, but none of them seem to be quite the same issue as I'm running into here. I've just completed an Android tutorial course, and built and released my very first app - I'm a newbie so forgive me if I've done something stupid!

My app works fine on the laptop - on a variety of emulators, with a variety of SDK versions, and also works on a real device when plugged into the laptop with a USB cable. However, when I upload it onto the GooglePlay store (and wait 3 days for it to get reviewed!) it then doesn't work when I download it - onto the same device as was connected via USB.

The app crashes before the first page even opens, and the only error info I can get it the error info provided by GooglePlay - included below. The problem appears to be with my Parse Initialisation, but I don't know what or why? Any help would be much appreciated!

GOOGLEPLAY ERROR LOG:

This problem occurs throughout the app but I am only posting my register activity.

Here is a screenshot of my register activity:

Here is the xml for my register activity. I don't think you need to read it.