The problem is very likely not the authentication. Unfortunately, you don’t provide details of the proxy configuration and the URL you use for the proxy. The only thing you provide is:
proxies = { 'https' : eampleIpWithAuth }
Based on the reference to _connect_tls_proxy in the stacktrace the eampleIpWithAuth is very likely something like https://..., i.e. you try to access the proxy itself over HTTPS. Note that accessing a proxy over HTTPS is different from using a HTTP proxy for HTTPS. When accessing a HTTPS URL over a HTTPS proxy one essentially does double encryption to the proxy:
client --- [HTTPS wrapped inside HTTPS] --- proxy --- [HTTPS] --- server
Whereas with a HTTPS URL over a “normal” HTTP proxy there is only single encryption, i.e. it looks (simplified) like this:
client --- [HTTPS wrapped inside HTTP] --- proxy --- [HTTPS] --- server
Very likely the proxy you want to use is a plain HTTP proxy, and not a HTTPS proxy. This is actually the most common case.
The error happens since the proxy is not able to speak TLS but gets accessed by TLS. The fix is to use http://proxy and not https://proxy as the proxy address. Note that the latter worked in older versions of Python since proxy over HTTPS was not supported and a value of https:// for the protocol was treated the same as http://.