如何在ktor中动态设置表头列表

@Dao
interface TokenDao {
@Insert(onConflict = OnConflictStrategy.REPLACE)
suspend fun insertToken(token: TokenEntity): Long
@Query("SELECT * FROM token WHERE id = :id")
suspend fun getTokenInfo(id: String): TokenEntity
}   

@Module
@InstallIn(SingletonComponent::class)
object NetworkModule {

private val json = Json {
encodeDefaults = true
ignoreUnknownKeys = true
}

@OptIn(InternalAPI::class)
@Singleton
@Provides
fun provideKtorHttpClient(
tokenRepository: TokenRepository,
tokenDao: TokenDao
): HttpClient {
return HttpClient(OkHttp) {
//Json Setting
install(JsonFeature) {
serializer = KotlinxSerializer(json = json)
}
//Logging Setting
install(Logging) {
logger = object : Logger {
override fun log(message: String) {
Timber.d("api log: $message")
}
}
logger = Logger.DEFAULT
level = LogLevel.ALL
}
//Timeout Setting
install(HttpTimeout) {
requestTimeoutMillis = 15_000
connectTimeoutMillis = 15_000
socketTimeoutMillis = 15_000
}

//Default Request Setting
defaultRequest {
contentType(ContentType.Application.Json)
accept(ContentType.Application.Json)
headers {
append("Accept-Version", "v1")
CoroutineScope(Main).launch {
val authToken = tokenDao.getTokenInfo("auth_token")
authToken?.let {
append(HttpHeaders.Authorization, authToken.token)
}
}
}
url {
protocol = URLProtocol.HTTP
host = Constants.BASE_URL
}
}
}
}

当向后端服务器发送请求时，如果房间中存储了一个值，请将其放入标头的授权中，然后如果没有值，尽量不要发送。因此，如果我用CorutineScope调用房间中的值，并且如果值为空，直接跳过但是，尽管有一个值，但标头不包括该值。当使用Ktor时，我应该如何实现根据标头值中是否存在令牌进行自动化的部分？