diff --git a/Cargo.toml b/Cargo.toml
index f64e7d5..1cec6f9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "manifold"
-version = "3.3.1"
+version = "4.0.0"
 authors = ["Lucy Bladen <admin@lbladen.uk>"]
 edition = "2021"
 
diff --git a/src/events.rs b/src/events.rs
index 90b335c..42d9e21 100644
--- a/src/events.rs
+++ b/src/events.rs
@@ -1,6 +1,6 @@
 use std::sync::atomic::AtomicBool;
 
-use poise::{Event, FrameworkContext};
+use poise::{async_trait, Event, FrameworkContext};
 use poise::serenity_prelude::model::{
     gateway::Ready,
 };
@@ -9,20 +9,20 @@ use crate::ManifoldData;
 use crate::error::{ManifoldError, ManifoldResult};
 use crate::models::user::UserInfo;
 
+#[async_trait]
+pub trait EventHandler {
+    async fn listen(ctx: &Context, framework_ctx: FrameworkContext<'_, ManifoldData, ManifoldError>, event: &Event<'_>) -> ManifoldResult<()>;
+}
+
 pub struct Handler {
     pub timer_running: AtomicBool,
 }
 
-impl Handler {
-    pub fn new() -> Self {
-        Handler {
-            timer_running: AtomicBool::from(false)
-        }
-    }
-
-    pub async fn listen(ctx: &Context, framework_ctx: FrameworkContext<'_, ManifoldData, ManifoldError>, event: &Event<'_>) -> ManifoldResult<()> {
+#[async_trait]
+impl EventHandler for Handler {
+    async fn listen(ctx: &Context, framework_ctx: FrameworkContext<'_, ManifoldData, ManifoldError>, event: &Event<'_>) -> ManifoldResult<()> {
         match event {
-            Event::Ready { data_about_bot} => Handler::standard_startup(&ctx, &framework_ctx, data_about_bot).await,
+            Event::Ready { data_about_bot } => Handler::standard_startup(&ctx, &framework_ctx, data_about_bot).await,
             Event::GuildBanAddition { guild_id, banned_user } => Handler::ban_add(&ctx, &framework_ctx, guild_id, banned_user).await,
             Event::GuildBanRemoval { guild_id, unbanned_user } => Handler::ban_remove(&ctx, &framework_ctx, guild_id, unbanned_user).await,
             Event::GuildMemberAddition { new_member } => Handler::new_member(&ctx, &framework_ctx, &new_member).await,
@@ -37,6 +37,15 @@ impl Handler {
             _ => Ok(())
         }
     }
+}
+
+impl Handler {
+
+    pub fn new() -> Self {
+        Handler {
+            timer_running: AtomicBool::from(false)
+        }
+    }
 
     pub async fn standard_startup(ctx: &Context, framework_ctx: &FrameworkContext<'_, ManifoldData, ManifoldError>, data_about_bot: &Ready) -> ManifoldResult<()> {
         let config = &framework_ctx.user_data().await.bot_config;
diff --git a/src/lib.rs b/src/lib.rs
index 64f4e8f..2c545a9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -16,7 +16,7 @@ use poise::serenity_prelude::*;
 
 use crate::config::ManifoldConfig;
 use crate::error::{ManifoldError, ManifoldResult};
-use crate::events::Handler;
+use crate::events::EventHandler;
 use crate::models::user::{ManifoldUserInfo, UserInfo};
 use crate::responses::Responses;
 
@@ -61,17 +61,17 @@ impl Deref for ManifoldData {
 }
 
 pub struct ManifoldDataInner {
-    bot_config: ManifoldConfig,
-    database: Db,
-    responses: Responses,
-    user_info: Mutex<ManifoldUserInfo>,
-    version_string: String,
+    pub bot_config: ManifoldConfig,
+    pub database: Db,
+    pub responses: Responses,
+    pub user_info: Mutex<ManifoldUserInfo>,
+    pub version_string: String,
 }
 
 pub type ManifoldContext<'a> = poise::Context<'a, ManifoldData, ManifoldError>;
 pub type ManifoldCommand = poise::Command<ManifoldData, ManifoldError>;
 
-pub async fn prepare_client(arguments: ArgMatches, intents: GatewayIntents, injected_commands: Vec<ManifoldCommand>, caller_version_string: String) -> ManifoldResult<FrameworkBuilder<ManifoldData, ManifoldError>> {
+pub async fn prepare_client<T: EventHandler>(arguments: ArgMatches, intents: GatewayIntents, injected_commands: Vec<ManifoldCommand>, caller_version_string: String, caller_database_migrations: EmbeddedMigrations) -> ManifoldResult<FrameworkBuilder<ManifoldData, ManifoldError>> {
     let bot_environment = arguments.get_one("environment").unwrap();
     let config_file = arguments.get_one::<String>("config-file").unwrap();
 
@@ -95,7 +95,7 @@ pub async fn prepare_client(arguments: ArgMatches, intents: GatewayIntents, inje
     let framework = poise::Framework::builder()
         .options(poise::FrameworkOptions {
             event_handler: |ctx, e, fctx, _| Box::pin(async move {
-                Handler::listen(ctx, fctx, e).await
+                T::listen(ctx, fctx, e).await
             }),
             pre_command: |ctx: ManifoldContext<'_>| Box::pin(async move {
                 info!("Received command {} from {}", ctx.command().name, ctx.author().name);
@@ -116,7 +116,7 @@ pub async fn prepare_client(arguments: ArgMatches, intents: GatewayIntents, inje
                 ctx.set_activity(Activity::watching("you")).await;
                 ctx.cache.set_max_messages(350);
                 let db = Db { pool };
-                apply_migrations(&mut db.get()?);
+                apply_migrations(&mut db.get()?, caller_database_migrations);
                 let user_info = UserInfo::load(&db).expect("Could not load user info, rejecting");
                 let git_info: String = built_info::GIT_VERSION.unwrap_or("unknown").to_string();
 
@@ -133,8 +133,10 @@ pub async fn prepare_client(arguments: ArgMatches, intents: GatewayIntents, inje
     Ok(framework)
 }
 
-fn apply_migrations(conn: &mut impl MigrationHarness<Sqlite>) {
+fn apply_migrations(conn: &mut impl MigrationHarness<Sqlite>, caller_migrations: EmbeddedMigrations) {
 
     conn.run_pending_migrations(MIGRATIONS)
         .expect("An error occurred applying migrations.");
+    conn.run_pending_migrations(caller_migrations)
+        .expect("An error occurred applying caller migrations");
 }
diff --git a/src/models/fueltank.rs b/src/models/fueltank.rs
index ed5597e..f071201 100644
--- a/src/models/fueltank.rs
+++ b/src/models/fueltank.rs
@@ -2,7 +2,6 @@ use std::env::temp_dir;
 use std::fmt::Debug;
 use std::fs;
 use std::path::PathBuf;
-use dirs::home_dir;
 use std::io::{SeekFrom, Seek};
 use reqwest::Client;
 use reqwest::header::{ACCEPT, CONTENT_TYPE};
diff --git a/src/models/user.rs b/src/models/user.rs
index 4fbae60..eb6e84d 100644
--- a/src/models/user.rs
+++ b/src/models/user.rs
@@ -7,7 +7,7 @@ use crate::schema::userinfo::dsl as userinfo_dsl;
 use crate::Db;
 use crate::error::{ManifoldError, ManifoldResult};
 
-#[derive(Identifiable, Insertable, AsChangeset, Debug, Queryable, Serialize, Clone)]
+#[derive(Identifiable, Insertable, AsChangeset, Selectable, Debug, Queryable, Serialize, Clone)]
 #[diesel(primary_key(user_id))]
 #[diesel(table_name = userinfo)]
 pub struct UserInfo {