Error Adding BYO SIP Trunk Number

I am trying to add my BYO SIP trunk number, which is a third-party number from Goto Connect, into Vapi following the steps you have provided. However, when I attempt to create the SIP trunk credentials, I encounter an error during the process. i have attached a screen shot for your reference

Since I am dependent on Vapi for this integration, I request an urgent solution to resolve this issue. Additionally, if there are any alternative methods to successfully add and use the third-party SIP trunk number with Vapi, please suggest them.

Looking forward to your prompt assistance.

Thank you,
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