[Feature:System] Add Self Account Creation docs (#657)

Co-authored-by: Barb Cutler <Barb Cutler>

Author: IDzyre

_docs/instructor/course_management/managing_enrollment.md

@@ -54,6 +54,10 @@ Once the user registers for the course, the instructor(s) will receive an email
 3. Check the checkbox for `Enable Self Registration`.
 4. (Optional) Select the default section you want users to be added to. This defaults to the first section. This can also be edited in the `Manage Sections` page.
 
+A related feature allows new users to make an account on your server.  
+See also [System Administrator instructions to enable Self Account Creation](/sysadmin/configuration/self_account_creation)
+
+
 ### Add students one-at-a-time
 
 1.  Instructors can add students to their course from the "Students"

_docs/student/account/index.md

@@ -11,12 +11,21 @@ favorite web browser.
 
 ![](/images/Login.png)
 
-Have your login credentials ready.  (Again, your instructor should
-provide this information.)  If you have trouble
+Have your login credentials ready.  Again, your instructor or
+university should provide this information.  If you have trouble
 authenticating/accessing the page, double check the URL and your
 username and password, and contact the instructor, TA, or system
 administrator as appropriate.
 
+If your school allows for users to create their own accounts, your
+login page will include a button "New to Submitty? Sign up now!".
+
+![](/images/Login_self_account_creation.png)
+
+Click that button and follow the instructions to specify your email address,
+given name, family name, and choose your Submitty User ID and Password.
+
+
 
 ## My Courses
 

_docs/sysadmin/configuration/self_account_creation.md

@@ -0,0 +1,59 @@
+---
+category: System Administrator > Configuration & Administration
+title: Self Account Creation
+---
+
+The feature of User Account Creation (a.k.a. Self Account Creation) is
+only available on systems that use DatabaseAuthentication.
+
+To change authentication types, either re-run `CONFIGURE_SUBMITTY.py`
+or manually edit `/usr/local/submitty/config/authentication.json` and
+change the authentication method to `DatabaseAuthentication`.
+
+See also [Managing Enrollment](/instructor/course_management/managing_enrollment)
+
+
+### Enable Self Account Creation
+
+To enable self account creation if you already have a Submitty instance setup, manually edit the
+`/usr/local/submitty/config/submitty.json` configuration file. By
+default, `user_create_account` is set to `false`. To enable it, change
+this to `true`.  You will also need to add configuration settings for
+`"user_id_requirements"`:
+
+
+```json
+"user_create_account": true,
+"user_id_requirements": {
+    "any_user_id": true,
+    "require_name": false,
+    "min_length": 6,
+    "max_length": 25,
+    "name_requirements": {
+      "given_first": false,
+      "given_name": 2,
+      "family_name": 4
+    },
+    "require_email": false,
+    "email_requirements": {
+      "whole_email": false,
+      "whole_prefix": false,
+      "prefix_count": 6
+    },
+    "accepted_emails": [
+      "gmail.com"
+    ]
+}
+```
+
+
+### Email and User ID Requirements
+
+
+* If `require_name` is true, then the `user_id` must start with and contain a
+certain amount of characters from the given name and/or family name.
+
+* If the user does not have the character amount for the given part of the name, it will accept shorter usernames. (e.g. James Wo -> woja, and James Joseph -> joseja)
+
+* `given_first` determines whether the given name or family name must come first. (e.g. Test User -> userte vs teuser)
+

images/Login_self_account_creation.png

@@ -179,6 +179,7 @@ var NAVTREE =
                 [ "Course Creation", "/sysadmin/configuration/course_creation", null ],
                 [ "Ansible Course Creation", "/sysadmin/configuration/ansible_course_creation", null ],
                 [ "Setting up Version Control", "/sysadmin/configuration/version_control", null ],
+                [ "Self Account Creation", "/sysadmin/configuration/self_account_creation", null ],
                 [ "SAML Authentication", "/sysadmin/configuration/saml_authentication", null ],
                 [ "Email Configuration", "/sysadmin/configuration/email_configuration", null ],
                 [ "Registration Feed", "/sysadmin/configuration/registration_feed", null ],