Lex Error message "There is no alias named "

Thank you Taka_M. Yup, that was my issue.

Also, for anyone else reading this I struggled a little to find the new endpoint URL, depending your region you will find it https://docs.aws.amazon.com/general/latest/gr/lex.html.

However, I have hit an issue where in v2 the SessionID is required. Is there a way to generate a SessionID in Postman?

Thanks Taka, am hitting the below issue now. from my post call, https://runtime-v2-lex.us-east-1.amazonaws.com/bots/botID/botAliases/botAliasID/botLocales/en_GB/sessions/test

{ "message": "The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details." }

I managed to get this working.

The error i was getting around the signature was due to my access key. You need to use user who has 'AmazonLexReadOnly' & 'AmazonLexRunBotsOnly' permissions.

hello @dowen93to98 I had a similar issues, but I got this error:

{
    "message": "Credential should be scoped to correct service: 'lex'. "
}

How did you give access? I'm kinda new in AWS i read a lot and I can't figure out what's going on, i did the following:

1. Create a CLI aws account (test user)
2. I added the permissions: AmazonLexReadOnly and AmazonLexRunBotsOnly I even added another that I read in another website ( I Created a new policy) with this json:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "VisualEditor0",
            "Effect": "Allow",
            "Action": [
                "lex:GetSession",
                "lex:RecognizeText",
                "lex:PutSession",
                "lex:DeleteSession",
                "lex:StartConversation",
                "lex:RecognizeUtterance"
            ],
            "Resource": "*"
        }
    ]
}

3. I created an access api key/secret key
4. Added to postman as AWS identification and hitting this url https://runtime-v2-lex.us-east-1.amazonaws.com/bots/KVI5WI1AAA/botAliases/UZA1JMDAAA/botLocales/en_US/sessions/random/text (the last letters I replaced with AAA just to hide the complete url and check if is the name or the ID)

I got the botId from lex website, the alias I think is the correct (same from lex but I'm not sure if is the name or this ID), the (access key 1 is the one I'm using, and says Access key last usedNever

I can't figure out what's wrong, I tried to read a lot of tutorials but I have no luck, could you please help me out and telling me how I can setup the user? Thanks