Powershell elseif is not recognised

Why am I getting the error with this code? The term 'elseif' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.

#  Check Vault login for Tech profile
function Ask-Creds {
    param(
        [ValidateNotNull()]
        $Credential = (Get-credential -message 'Please enter  Technician`s login & password for Terminal registration:')        
    )
    $vault="3.2.1.1:8500"
    $encodedCreds = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes($Credential))   
    $basicAuthValue = "Basic $encodedCreds" 
    $Headers = @{Authorization = $basicAuthValue}
    $rawcontent=(Invoke-WebRequest -Uri $vault -Headers $Headers).StatusCode
    echo "$rawcontent"
}

$result = Ask-Creds

if ( $result -contains '200' ) { Write-Host "Technician is authenticated!" }
ElseIf ( $result -contains '400' ) {Write-Host "Bad credentials!" | Ask-Creds }
ElseIf ( $result -contains '000' ) {Write-Host "Connection failed!" | exit 1 }

ElseIf : The term 'ElseIf' is not recognized as the name of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ ElseIf ( $result -contains '400' )
+ ~~~~~~