flow fails when we open second tab. owerwritting state in session

[emil191995]

When I open 2 tabs this way I opened first tab then opened second tab after returned first tab and tried to sign in flow is failing cos second tab overwrote state of first tab in session I did some debugging and I think we can make state as table
store state in the session

  session:set("state", state)
  session:set("nonce", nonce)
  session:set("original_url", target_url)
  session:set("code_verifier", code_verifier)
  session:set("last_authenticated", ngx.time())

replace with following

local states = session:get("oidc_states") or {}
  states[state] = {
    nonce = nonce,
    code_verifier = code_verifier,
    created_at = ngx.time()
  }
  session:set("oidc_states", states)
  session:set("original_url", target_url)
  session:set("last_authenticated", ngx.time())