You can use the mongo command line client to set the password and salt for the admin user to these values. The password is test.
Run mongo then copy/paste the following:
use genieacs;
db.users.update({_id: "admin"}, {password: "fde2292ef35ba1539838382c4bed9e70814863bfdfa965d441db6589706f5d6644355ea44a9e87dd4dcc55eef5eab3271d1381aaa065cae51097617543d21ab5bf89f1354a965549e31a4732adf76a34b1b58e4fe6b2fbd551486c371ff93697892f3b34bc8918f3b5dcf2f884e75119f445ffb30451d621e69adf54bd4d449d", salt: "e651b0669d7e0ee92283af98f4500d5a83c2d14b67842e1685456e7bf889df9ead8c814208ad74d4a4fc374cf23215c6ba32ef2601d3fa8c0b603d5c5a2692e5"});