Add documentation about user management (#8321)

docs/docs/start/accounts.md

@@ -0,0 +1,49 @@
+---
+title: Account Management
+---
+
+## User Accounts
+
+By default, InvenTree does not ship with any user accounts. Configuring user accounts is the first step to login to the InvenTree server.
+
+### Administrator Account
+
+You can configure InvenTree to create an administrator account on the first run. This account will have full *superuser* access to the InvenTree server.
+
+This account is created when you first run the InvenTree server instance. The username / password for this account can be configured in the configuration file, or environment variables.
+
+!!! info "More Information"
+    For more information on configuring the administrator account, refer to the [configuration documentation](./config.md#administrator-account).
+
+### Create Superuser
+
+Another way to create an administrator account is to use the `superuser` command. This will create a new superuser account with the specified username and password.
+
+```bash
+invoke superuser
+```
+
+Or, if you are running InvenTree in a Docker container:
+
+```bash
+docker exec -rm -it inventree-server invoke superuser
+```
+
+### User Management
+
+Once you have created an administrator account, you can create and manage additional user accounts from the InvenTree web interface.
+
+## Password Management
+
+### Reset Password via Command Line
+
+If a password has been lost, and other backup options (such as email recovery) are unavailable, the system administrator can reset the password for a user account from the command line.
+
+Log into the machine running the InvenTree server, and run the following command (from the top-level source directory):
+
+```bash
+cd src/backend/InvenTree
+python ./manage.py changepassword <username>
+```
+
+The system will prompt you to enter a new password for the specified user account.