Recently I have updated my xen center version to latest one and after adding the new servers credentials were not getting saved in xen center. Every time I need to enter login details while connecting to any server. While connecting to any server it was asking for login details.
How to remember credentials in Xen Center
In Xen Center click on Tools and then click on Options in Option there is further tab called as save and restore there tick on save and restore server connection state on startup
Now from next time xen center will not ask any kind of password and it will remember the credentials you have entered previously.