Fix error handling and add nixos test

.nixos-test-history

@@ -0,0 +1,78 @@
+
+# 2024-12-29 13:58:54.893983
++machine.shell_interact()
+
+# 2024-12-29 14:04:50.006813
++machine.wait_for_unit("default.target")
+
+# 2024-12-29 14:05:20.701959
++machine.send_chars("Admin\n")
+
+# 2024-12-29 14:05:34.563727
++machine.send_chars("APwdQ1dmin\n")
+
+# 2024-12-29 14:06:02.762977
++machine.send_chars("Admin")
+
+# 2024-12-29 14:06:16.344513
++machine.send_chars("APwdQ1dmin\n")
+
+# 2024-12-29 14:07:32.702436
++machine.send_chars(b"Admin\n")
+
+# 2024-12-29 14:07:39.866524
++machine.send_chars(b"Admin")
+
+# 2024-12-29 14:07:42.979641
++machine.send_chars("Admin")
+
+# 2024-12-29 14:07:48.519884
++machine.send_chars("Admin\n")
+
+# 2024-12-29 14:08:14.028807
++machine.send_chars("Admin")
+
+# 2024-12-29 14:08:22.651984
++machine.send_chars("Admin\n")
+
+# 2024-12-29 14:08:44.603595
++machsend_chars("Admin\n")
+
+# 2024-12-29 14:08:54.793100
++machine.send_chars("Admin\n")
+
+# 2024-12-29 14:09:15.589406
++machine.send_chars("AdminPwdQ1\n")
+
+# 2024-12-29 15:32:44.284835
++machine.send_chars("Admin\r")
+
+# 2024-12-29 15:32:51.799888
++machine.execute()
+
+# 2024-12-29 15:33:01.065792
++machine.connect
+
+# 2024-12-29 15:33:04.371022
++machine.connect()
+
+# 2024-12-29 15:34:01.471220
++machine.send_chars("Admin\r")
+
+# 2024-12-29 15:34:08.785393
++machine.send_chars("Admin\x0D")
+
+# 2024-12-29 15:34:17.570504
++machine.send_chars("Admin\lf")
+
+# 2024-12-29 15:34:20.671653
++machine.send_chars("Admin\l")
+
+# 2024-12-29 15:35:12.675488
++machine.send_chars("Admin\n")
+
+# 2024-12-29 15:35:47.369820
++machine.send_chars("AdminPwdQ1\n")
+
+# 2024-12-29 15:36:11.188925
++machine.send_chars("Admin\n")