private String key(final String selectorName) {
        return String.join(":", selectorName, PluginNameAdapter.rpcTypeAdapter(rpcType()));
    }
Register uri string.

@param selectorName the selector name
@param uriList      the uri list
@return the string
shenyu-admin/src/main/java/org/apache/shenyu/admin/service/register/FallbackShenyuClientRegisterService.java