#3 Add login route for token generation and jwt package change with corepkg tag v1.2.13

Merged Pushkaraj Sane requested to merge ps_jwtPackageUpgradation into development

Added route of Login in gogin template. Changed jwt package dgrijalva/jwt-go to golang-jwt/jwt/v5". Creted function generateTokenForLogin. Updated Corepkg tag to v1.2.13.

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