Move packages + remove circular dependencies

simplenotes-domain/src/main/kotlin/be/simplenotes/domain/security/JwtPayload.kt

@@ -0,0 +1,21 @@
+package be.simplenotes.domain.security
+
+import be.simplenotes.types.PersistedUser
+import com.auth0.jwt.exceptions.JWTVerificationException
+
+data class JwtPayload(val userId: Int, val username: String) {
+    constructor(user: PersistedUser) : this(user.id, user.username)
+}
+
+class JwtPayloadExtractor(private val jwt: SimpleJwt) {
+    operator fun invoke(token: String): JwtPayload? = try {
+        val decodedJWT = jwt.verifier.verify(token)
+        val id = decodedJWT.getClaim(userIdField).asInt() ?: null
+        val username = decodedJWT.getClaim(usernameField).asString() ?: null
+        id?.let { username?.let { JwtPayload(id, username) } }
+    } catch (e: JWTVerificationException) {
+        null
+    } catch (e: IllegalArgumentException) {
+        null
+    }
+}