diff --git a/src/api/users.rs b/src/api/users.rs
index a1b9ef4..fdbb203 100644
--- a/src/api/users.rs
+++ b/src/api/users.rs
@@ -55,7 +55,7 @@ pub async fn change_handle(
     let mut target = if u.id == id {
         u
     } else {
-        if u.has_permission(Permission::ChangeOthersHandles)? == false {
+        if !u.has_permission(Permission::ChangeOthersHandles)? {
             return Ok((StatusCode::FORBIDDEN, CANT_CHANGE_OTHERS_HANDLE).into_response());
         }
         User::get_by_id(id)?
@@ -77,7 +77,7 @@ pub async fn change_password(
     let mut target = if u.id == id {
         u
     } else {
-        if u.has_permission(Permission::ChangeOthersPasswords)? == false {
+        if !u.has_permission(Permission::ChangeOthersPasswords)? {
             return Ok((StatusCode::FORBIDDEN, CANT_CHANGE_OTHERS_PASSW).into_response());
         }
         User::get_by_id(id)?
diff --git a/src/database/mod.rs b/src/database/mod.rs
index 99e9018..2551888 100644
--- a/src/database/mod.rs
+++ b/src/database/mod.rs
@@ -27,7 +27,7 @@ CREATE TABLE IF NOT EXISTS migrations (
 pub struct DatabaseError(#[from] rusqlite::Error);
 impl IntoResponse for DatabaseError {
     fn into_response(self) -> axum::response::Response {
-        println!("[DB ERROR] {}", self.to_string());
+        println!("[DB ERROR] {}", self);
         (StatusCode::INTERNAL_SERVER_ERROR, "Internal server error.").into_response()
     }
 }
@@ -35,7 +35,7 @@ impl IntoResponse for DatabaseError {
 pub fn conn() -> Result<Connection, rusqlite::Error> {
     let conn = Connection::open(&*DB_URL)?;
     for pragma in CONNECTION_PRAGMAS {
-        conn.query_row(*pragma, (), |_| Ok(())).optional()?;
+        conn.query_row(pragma, (), |_| Ok(())).optional()?;
     }
     Ok(conn)
 }
@@ -43,7 +43,7 @@ pub fn conn() -> Result<Connection, rusqlite::Error> {
 pub fn migrations() -> Result<(), Box<dyn Error>> {
     let conn = Connection::open(&*DB_URL)?;
     for pragma in PERSISTENT_PRAGMAS {
-        conn.query_row(*pragma, (), |_| Ok(()))?;
+        conn.query_row(pragma, (), |_| Ok(()))?;
     }
     conn.execute(TABLE_MIGRATIONS, ())?;
 
@@ -58,7 +58,7 @@ pub fn migrations() -> Result<(), Box<dyn Error>> {
         println!("Applying migration {key}...");
 
         conn.execute_batch(sql)?;
-        conn.execute("INSERT INTO migrations(id) VALUES (?1)", &[key])?;
+        conn.execute("INSERT INTO migrations(id) VALUES (?1)", [key])?;
     }
 
     if changes {
diff --git a/src/main.rs b/src/main.rs
index 5e5829e..4e53ba6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -17,10 +17,10 @@ const ISE_MSG: &str = "Internal server error";
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn Error>> {
-    if let Err(e) = dotenvy::dotenv() {
-        if !e.not_found() {
-            return Err(e.into());
-        }
+    if let Err(e) = dotenvy::dotenv()
+        && !e.not_found()
+    {
+        return Err(e.into());
     }
 
     database::migrations()?;
diff --git a/src/quotes/lines.rs b/src/quotes/lines.rs
index 155e7cf..dd37193 100644
--- a/src/quotes/lines.rs
+++ b/src/quotes/lines.rs
@@ -2,6 +2,7 @@ use uuid::Uuid;
 
 use crate::persons::{Person, names::Name};
 
+#[allow(unused)]
 pub struct QuoteLine {
     pub id: Uuid,
     pub attribution: (Name, Person),
diff --git a/src/quotes/mod.rs b/src/quotes/mod.rs
index 9bd699b..ff5561a 100644
--- a/src/quotes/mod.rs
+++ b/src/quotes/mod.rs
@@ -5,6 +5,7 @@ use crate::quotes::lines::QuoteLine;
 
 pub mod lines;
 
+#[allow(unused)]
 pub struct Quote {
     pub id: Uuid,
     pub lines: Vec<QuoteLine>,
diff --git a/src/tags.rs b/src/tags.rs
index 3bce54e..9768ff4 100644
--- a/src/tags.rs
+++ b/src/tags.rs
@@ -91,15 +91,15 @@ pub struct TagName(String);
 #[derive(Debug, thiserror::Error, Clone, PartialEq, Eq, Serialize)]
 pub enum TagNameError {
     #[error("Tag is too short - must be 2 or more characters.")]
-    TagTooShort,
+    TooShort,
     #[error("Tag is too long - must be 24 or less characters.")]
-    TagTooLong,
+    TooLong,
     #[error("Tag must consist of ASCII alphanumerics or mid-tag dashes only.")]
-    TagNonDashAsciiAlphanumeric,
+    NonDashAsciiAlphanumeric,
     #[error("Tag must not have a leading or trailing dash.")]
-    TagLeadingTrailingDash,
+    LeadingTrailingDash,
     #[error("Tag must not have consecutive dashes.")]
-    TagConsecutiveDashes,
+    ConsecutiveDashes,
 }
 
 impl TagName {
@@ -110,22 +110,22 @@ impl TagName {
     }
     pub fn validate_str(str: &str) -> Result<(), TagNameError> {
         match str.len() {
-            ..2 => return Err(TagNameError::TagTooShort),
-            25.. => return Err(TagNameError::TagTooLong),
+            ..2 => return Err(TagNameError::TooShort),
+            25.. => return Err(TagNameError::TooLong),
             _ => (),
         };
         if str.bytes().any(|c| !c.is_ascii_alphanumeric() && c != b'-') {
-            return Err(TagNameError::TagNonDashAsciiAlphanumeric);
+            return Err(TagNameError::NonDashAsciiAlphanumeric);
         }
         if str.starts_with('-') || str.ends_with('-') {
-            return Err(TagNameError::TagLeadingTrailingDash);
+            return Err(TagNameError::LeadingTrailingDash);
         }
         if str
             .as_bytes()
             .windows(2)
             .any(|w| w[0] == b'-' && w[1] == b'-')
         {
-            return Err(TagNameError::TagConsecutiveDashes);
+            return Err(TagNameError::ConsecutiveDashes);
         }
         Ok(())
     }
@@ -184,7 +184,7 @@ impl From<TagName> for String {
 
 impl ToSql for TagName {
     fn to_sql(&self) -> RusqliteResult<ToSqlOutput<'_>> {
-        Ok(self.0.to_sql()?)
+        self.0.to_sql()
     }
 }
 
diff --git a/src/users/auth/implementation.rs b/src/users/auth/implementation.rs
index 63a52d7..1c671d9 100644
--- a/src/users/auth/implementation.rs
+++ b/src/users/auth/implementation.rs
@@ -120,7 +120,7 @@ impl<'a> AuthScheme<'a> {
 
 impl UserAuthenticate for User {
     fn authenticate(headers: &HeaderMap) -> Result<Option<User>, AuthError> {
-        let (basic_auth, bearer_auth) = auth_common(&headers);
+        let (basic_auth, bearer_auth) = auth_common(headers);
 
         match (basic_auth, bearer_auth) {
             (Some(creds), _) => authenticate_basic(&creds),
@@ -131,7 +131,7 @@ impl UserAuthenticate for User {
 }
 impl SessionAuthenticate for Session {
     fn authenticate(headers: &HeaderMap) -> Result<Option<Session>, AuthError> {
-        let (_, bearer_auth) = auth_common(&headers);
+        let (_, bearer_auth) = auth_common(headers);
         if let Some(token) = bearer_auth {
             authenticate_bearer_with_session(&token)
         } else {
@@ -203,7 +203,7 @@ pub fn authenticate_via_credentials(
             false => Err(AuthError::InvalidCredentials),
         },
         _ => {
-            let _ = User::match_hash_password(DUMMY_PASSWORD, &*DUMMY_PASSWORD_PHC)?;
+            let _ = User::match_hash_password(DUMMY_PASSWORD, &DUMMY_PASSWORD_PHC)?;
             Err(AuthError::InvalidCredentials)
         }
     }
diff --git a/src/users/auth/mod.rs b/src/users/auth/mod.rs
index 89cb6b9..edc6932 100644
--- a/src/users/auth/mod.rs
+++ b/src/users/auth/mod.rs
@@ -33,7 +33,7 @@ pub trait UserPasswordHashing {
     fn match_hash_password(passw: &str, hash: &str) -> Result<bool, argon2::password_hash::Error>;
 }
 
-pub static SHARED_ARGON: LazyLock<Argon2> = LazyLock::new(|| Argon2::default());
+pub static SHARED_ARGON: LazyLock<Argon2> = LazyLock::new(Argon2::default);
 pub const DUMMY_PASSWORD: &str = "PASSWORD";
 pub static DUMMY_PASSWORD_PHC: LazyLock<String> = LazyLock::new(|| {
     let salt = SaltString::generate(&mut OsRng);
@@ -70,15 +70,17 @@ pub enum AuthError {
 }
 
 #[derive(Debug, Clone, Copy)]
-#[allow(unused)]
 pub enum TokenSize {
     /// 5 bytes = 8 chars
+    #[allow(unused)]
     Char8,
     /// 10 bytes = 16 chars
     Char16,
     /// 20 bytes = 32 chars
+    #[allow(unused)]
     Char32,
     /// 40 bytes = 64 chars
+    #[allow(unused)]
     Char64,
 }
 
diff --git a/src/users/handle.rs b/src/users/handle.rs
index 181c5aa..4bbf872 100644
--- a/src/users/handle.rs
+++ b/src/users/handle.rs
@@ -14,11 +14,11 @@ pub struct UserHandle(String);
 #[derive(Debug, thiserror::Error, Clone, PartialEq, Eq, Serialize)]
 pub enum UserHandleError {
     #[error("Handle is too short - must be 3 or more characters.")]
-    HandleTooShort,
+    TooShort,
     #[error("Handle is too long - must be 16 or less characters.")]
-    HandleTooLong,
+    TooLong,
     #[error("Handle must consist of ASCII alphanumeric characters only.")]
-    HandleNonAsciiAlphanumeric,
+    NonAsciiAlphanumeric,
 }
 
 impl UserHandle {
@@ -29,12 +29,12 @@ impl UserHandle {
     }
     pub fn validate_str(str: &str) -> Result<(), UserHandleError> {
         match str.len() {
-            ..=2 => return Err(UserHandleError::HandleTooShort),
-            17.. => return Err(UserHandleError::HandleTooLong),
+            ..=2 => return Err(UserHandleError::TooShort),
+            17.. => return Err(UserHandleError::TooLong),
             _ => (),
         };
         if str.bytes().any(|c| !c.is_ascii_alphanumeric()) {
-            return Err(UserHandleError::HandleNonAsciiAlphanumeric);
+            return Err(UserHandleError::NonAsciiAlphanumeric);
         }
         Ok(())
     }
@@ -93,7 +93,7 @@ impl From<UserHandle> for String {
 
 impl ToSql for UserHandle {
     fn to_sql(&self) -> RusqliteResult<ToSqlOutput<'_>> {
-        Ok(self.0.to_sql()?)
+        self.0.to_sql()
     }
 }
 
diff --git a/src/users/mod.rs b/src/users/mod.rs
index 942b122..e05ac2c 100644
--- a/src/users/mod.rs
+++ b/src/users/mod.rs
@@ -79,10 +79,10 @@ impl User {
         conn.prepare("UPDATE users SET handle = ?1 WHERE id = ?2")?
             .execute((&new_handle, self.id))
             .map_err(|e| {
-                if let Some(e) = e.sqlite_error() {
-                    if e.code == ErrorCode::ConstraintViolation {
-                        return UserError::HandleAlreadyExists(new_handle.clone());
-                    }
+                if let Some(e) = e.sqlite_error()
+                    && e.code == ErrorCode::ConstraintViolation
+                {
+                    return UserError::HandleAlreadyExists(new_handle.clone());
                 }
                 UserError::from(e)
             })?;
diff --git a/src/users/permissions.rs b/src/users/permissions.rs
index d87ae31..9e2e631 100644
--- a/src/users/permissions.rs
+++ b/src/users/permissions.rs
@@ -13,7 +13,10 @@ pub enum Permission {
 }
 
 impl User {
-    pub fn has_permission(&self, permission: Permission) -> Result<bool, DatabaseError> {
+    pub fn has_permission(
+        &self,
+        #[allow(unused)] permission: Permission,
+    ) -> Result<bool, DatabaseError> {
         // Infradmin and systemuser have all permissions
         if self.is_infradmin() || self.is_systemuser() {
             return Ok(true);
diff --git a/src/users/sessions.rs b/src/users/sessions.rs
index 142ea4c..5dfa4b2 100644
--- a/src/users/sessions.rs
+++ b/src/users/sessions.rs
@@ -67,7 +67,7 @@ impl Session {
         let res = database::conn()?
             .prepare("SELECT user_id, expiry, revoked, revoked_at, revoked_by FROM sessions WHERE id = ?1")?
             .query_one((&id,), |r| Ok(Session {
-                id: id,
+                id,
                 user_id: r.get(0)?,
                 expiry: r.get(1)?,
                 status: match r.get::<_, bool>(2)? {