 <i>ui_method</i> with associated data <i>ui_data</i>, and post processing callback <i>post_process</i> with associated data <i>post_process_data</i>, opens a channel to the data located at that URI and returns a <b>OSSL_STORE_CTX</b> with all necessary internal information. The given <i>ui_method</i> and <i>ui_data</i> will be reused by all functions that use <b>OSSL_STORE_CTX</b> when interaction is needed, for instance to provide a password. The given <i>post_process</i> and <i>post_process_data</i> will