Update check last login script with better reporting and csv/json output

Now for each ssh group we report last login/account create stats.
Add the main user group to output
Add unlock user commands for locked users

Add CSV and JSON formatted output

Readme.md

@@ -257,6 +257,66 @@ The script can be put into the crontab and run once a month, it prints to STDOUT
 0 2 1 * * root /root/users/bin/check_last_login.sh | mail -s "User Account check: $(hostname)"
 ```
 
+For processable output there is a "csv" and "json" option to output the data in CSV or JSON format
+
+Example csv
+
+```csv
+Hostname,Username,Main Group,SSH Group,Account Created Date,Account Age,Last Login Date,Last Login Age,Login Source,Never Logged In,Status
+some.host,name_a,staff,sshallow,2021-11-18,764,,,,true,[!] Never logged in: account created 764 days ago
+some.host,name_b,staff,sshallow,2021-11-15,767,2023-12-20 22:18:36,1,ssh,false,OK [ssh]
+...
+```
+
+```json
+{
+  "Info": {
+    "Hostname": "host.name",
+    "Date": "2023-12-21 13:11:45",
+    "MaxAgeLogin": 90,
+    "MaxAgeCreate": 30
+  },
+  "Users": [
+    {
+      "Username": "name_a",
+      "SshGroup": "sshallow",
+      "MainGroup": "staff",
+      "SubGroups": [],
+      "AccountCreatedDate": "2021-11-18",
+      "AccountAge": "764",
+      "LastLoginDate": "",
+      "LastLoginAge": "",
+      "LoginSource": "",
+      "NeverLoggedIn": true,
+      "Status": "[!] Never logged in: account created 764 days ago"
+    },
+    {
+      "Username": "name_b",
+      "SshGroup": "sshallow",
+      "MainGroup": "staff",
+      "SubGroups": [
+        "sudo",
+        "users",
+        "ikea",
+        "harley",
+        "aeon",
+        "primaham",
+        "nisshin",
+        "nissan",
+        "pfizer"
+      ],
+      "AccountCreatedDate": "2021-11-15",
+      "AccountAge": "767",
+      "LastLoginDate": "2023-12-20 22:18:36",
+      "LastLoginAge": "1",
+      "LoginSource": "ssh",
+      "NeverLoggedIn": false,
+      "Status": "OK [ssh]"
+    },
+  ]
+}
+```
+
 ## Delete users
 
 `bin/delete_user.sh -t -b <user 1> <user 2> ...`