schema migration and account fixes

very close to rolling this out! just need to address some security concerns first

README.md

@@ -21,9 +21,9 @@ library for others to use in their own sites. exciting stuff!
 ## running
 
 the server should be run once to generate a default `config.toml` file.
-configure as needed. note that a valid DB connection is required, and the admin
-panel will be disabled without valid discord app credentials (this can however
-be bypassed by running the server with `-adminBypass`).
+configure as needed. a valid DB connection is required to run this website.
+if no admin users exist, an invite code will be provided. invite codes are
+the only way to create admin accounts at this time.
 
 the configuration may be overridden using environment variables in the format
 `ARIMELODY_<SECTION_NAME>_<KEY_NAME>`. for example, `db.host` in the config may
@@ -32,6 +32,16 @@ be overridden with `ARIMELODY_DB_HOST`.
 the location of the configuration file can also be overridden with
 `ARIMELODY_CONFIG`.
 
+## command arguments
+
+by default, `arimelody-web` will spin up a web server as usual. instead,
+arguments may be supplied to run administrative actions. the web server doesn't
+need to be up for this, making this ideal for some offline maintenance.
+
+- `createInvite`: Creates an invite code to register new accounts.
+- `purgeInvites`: Deletes all available invite codes.
+- `deleteAccount <username>`: Deletes an account with a given `username`.
+
 ## database
 
 the server requires a postgres database to run. you can use the