add: profile connections, spotify connection

crates/core/src/database/connections/mod.rs

@@ -0,0 +1 @@
+pub mod spotify;

crates/core/src/database/connections/spotify.rs

@@ -0,0 +1,21 @@
+use std::collections::HashMap;
+use crate::{
+    config::Config,
+    model::auth::{ConnectionType, ExternalConnectionInfo, UserConnections},
+};
+
+/// A connection to Spotify.
+///
+/// <https://developer.spotify.com/documentation/web-api>
+pub struct SpotifyConnection(pub UserConnections, pub Config);
+
+impl SpotifyConnection {
+    /// Create a new [`ExternalConnectionInfo`] for the connection.
+    pub fn connection() -> ExternalConnectionInfo {
+        ExternalConnectionInfo {
+            con_type: ConnectionType::PKCE,
+            data: HashMap::new(),
+            show_on_profile: true,
+        }
+    }
+}