6 database authentication provider#3

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annakhuseinova wants to merge 6 commits intospringframeworkguru:masterfrom

annakhuseinova:6-database-authentication-provider

Commits on Jul 25, 2020

Added tests for basic authentication
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Added basic java security config
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Added mvc matchers
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Added in memory authentication using 2 techniques
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Commits on Jul 26, 2020

Added custom authentication filter
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Added databse authentication
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