How can spotify connect play music on my Echo device after installing the skill? I mean I don't know how to interact with alexa without my voice. How do they do it?
This is the Amazon Developer Forum, where developers come for help with the development of their skills. Features available (or not) on Alexa do not fall under this category. If you are having issues with an Alexa feature, I would suggest getting in touch with customer service here who should be able to assist with your matter further.
Alternatively, you can post your questions on the Echo & Alexa customer forum: https://www.amazonforum.com/forums/devices/echo-alexa
However, for skill development, Notification (or proactive events) are only allowing specific schemas as notifications.
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