feat(api): wrap database password with Secret

src/configuration.rs

@@ -1,3 +1,5 @@
+use secrecy::{ExposeSecret, Secret};
+
 #[derive(serde::Deserialize)]
 pub struct Settings {
     pub database: DatabaseSettings,
@@ -7,7 +9,7 @@ pub struct Settings {
 #[derive(serde::Deserialize)]
 pub struct DatabaseSettings {
     pub username: String,
-    pub password: String,
+    pub password: Secret<String>,
     pub port: u16,
     pub host: String,
     pub database_name: String,
@@ -25,17 +27,24 @@ pub fn get_configuration() -> Result<Settings, config::ConfigError> {
 }
 
 impl DatabaseSettings {
-    pub fn connection_string(&self) -> String {
-        format!(
+    pub fn connection_string(&self) -> Secret<String> {
+        Secret::new(format!(
             "postgres://{}:{}@{}:{}/{}",
-            self.username, self.password, self.host, self.port, self.database_name
-        )
+            self.username,
+            self.password.expose_secret(),
+            self.host,
+            self.port,
+            self.database_name
+        ))
     }
 
-    pub fn connection_string_without_db(&self) -> String {
-        format!(
+    pub fn connection_string_without_db(&self) -> Secret<String> {
+        Secret::new(format!(
             "postgres://{}:{}@{}:{}",
-            self.username, self.password, self.host, self.port
-        )
+            self.username,
+            self.password.expose_secret(),
+            self.host,
+            self.port
+        ))
     }
 }

src/main.rs

@@ -2,6 +2,7 @@ use std::net::TcpListener;
 
 use email_newsletter_api::telemetry::{get_subscriber, init_subscriber};
 use email_newsletter_api::{configuration::get_configuration, startup};
+use secrecy::ExposeSecret;
 use sqlx::PgPool;
 
 #[tokio::main]
@@ -15,7 +16,7 @@ async fn main() -> Result<(), std::io::Error> {
     );
     init_subscriber(subscriber);
 
-    let db_conn = PgPool::connect(&configuration.database.connection_string())
+    let db_conn = PgPool::connect(configuration.database.connection_string().expose_secret())
         .await
         .expect("Failed to connect to PostgreSQL");